{"title":"Piston kits \u0026 Components","description":null,"products":[{"product_id":"kb-pistons-hypereutectic-cast-piston-pistons-evo-80ci-8-6-1-010-824-01002","title":"Kb Pistons Hypereutectic Cast Piston 8.6:1 .010 Over - Harley Evolution 80ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eUpgrade your Harley Evolution 80ci engine with a Kb Pistons Hypereutectic Cast Piston. This .010 inch oversize piston features an 8.6:1 compression ratio, ideal for a refresh or mild performance build. Its advanced 16% silicon content provides high thermal barrier properties and low expansion, perfectly suited for air-cooled applications.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003eHypereutectic 16% silicon alloy for thermal stability\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eLow thermal expansion for tight clearances\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eDesigned for stock to mild 8.6:1 compression ratios\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003e.010 inch oversize for rebuilding\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eOptimized for air-cooled Harley Evolution 80ci engines\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhen rebuilding or upgrading your Evolution 80ci engine, selecting the right piston is crucial for performance and longevity. Kb Pistons Hypereutectic Cast Pistons deliver a tight ring seal and reduced wear, allowing your engine to run efficiently on pump fuel. The hypereutectic alloy is a smart choice for street-driven V-twins, offering a balance of strength and thermal stability.\u003c\/p\u003e\u003ch3\u003eEngineered for Evolution Performance\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eHypereutectic alloy with 16% silicon content for superior thermal management\u003c\/li\u003e\n\u003cli\u003eLow thermal expansion rate allows for tighter piston-to-cylinder clearances\u003c\/li\u003e\n\u003cli\u003eOptimized for stock or mild compression ratios up to 10.5:1\u003c\/li\u003e\n\u003cli\u003eDesigned specifically for air-cooled Harley-Davidson Evolution engines\u003c\/li\u003e\n\u003cli\u003ePromotes excellent ring seal and reduced blow-by\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReliable Power for Your EVO\u003c\/h3\u003e\u003cp\u003eThese pistons are an excellent choice for riders looking to restore or mildly enhance their Evolution 80ci engine. The precise engineering ensures reliable performance, making them suitable for stock replacements or builds aiming for a bit more punch without requiring race fuel. Ensure proper machining and break-in for optimal results with your Touring, Softail, or Dyna.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB258.010\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745060365\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 8.6:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine Displacement:\u003c\/strong\u003e 80 cubic inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePiston Oversize:\u003c\/strong\u003e .010 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 9.5 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 4.8 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 4.6 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.65 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat compression ratio are these pistons designed for?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThese hypereutectic pistons are best suited for stock or mild compression ratios up to 10.5:1, specifically at 8.6:1, and are optimized for running on pump fuel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhy choose hypereutectic pistons over forged pistons?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eHypereutectic pistons, with their high silicon content, offer excellent thermal stability and lower expansion rates, allowing for tighter clearances and quieter operation, making them ideal for street-focused air-cooled V-twin engines running pump fuel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWill these pistons fit my specific Harley Evolution model?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThese pistons are designed for Harley Evolution 80 cubic inch air-cooled engines found in various Touring, Softail, and Dyna models. Always confirm fitment for your exact year and model before purchase.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Hypereutectic Cast Piston 8.6:1 .010 Over - Harley Evolution 80ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-hypereutectic-cast-piston-pistons-evo-80ci-8-6-2\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What compression ratio are these pistons designed for?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"These hypereutectic pistons are best suited for stock or mild compression ratios up to 10.5:1, specifically at 8.6:1, and are optimized for running on pump fuel.\"}},{\"@type\":\"Question\",\"name\":\"Why choose hypereutectic pistons over forged pistons?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Hypereutectic pistons, with their high silicon content, offer excellent thermal stability and lower expansion rates, allowing for tighter clearances and quieter operation, making them ideal for street-focused air-cooled V-twin engines running pump fuel.\"}},{\"@type\":\"Question\",\"name\":\"Will these pistons fit my specific Harley Evolution model?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"These pistons are designed for Harley Evolution 80 cubic inch air-cooled engines found in various Touring, Softail, and Dyna models. Always confirm fitment for your exact year and model before purchase.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035460231279,"sku":"824-01002","price":243.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_6c4080d2-4030-4191-8871-0f9295f5723b.png?v=1779561759"},{"product_id":"kb-pistons-hypereutectic-cast-piston-pistons-evo-80ci-8-6-1-020-824-01003","title":"Kb Pistons Hypereutectic Cast Piston 8.6:1 .020 Over - Harley Evolution 80ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eRefresh your Harley Evolution 80ci engine with a Kb Pistons Hypereutectic Cast Piston, sized .020 over stock bore. This piston features an 8.6:1 compression ratio and is cast from a 16% high-silicon alloy, engineered to reduce thermal expansion and improve ring seal in air-cooled Harley engines running pump fuel.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003eHypereutectic 16% silicon alloy for thermal stability\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eLow thermal expansion allows tight clearances\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eDesigned for stock to mild 8.6:1 compression ratios\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003e.020 inch oversize for cylinder rebuilds\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eReduces engine noise and wear in air-cooled engines\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhen it's time for an engine rebuild, choosing the right piston is paramount for restoring performance and ensuring longevity. Kb Pistons Hypereutectic Cast Pistons offer a precise fit and reliable operation for your Evolution 80ci. The advanced alloy design helps to minimize engine noise and wear, providing a solid foundation for your V-twin's power plant.\u003c\/p\u003e\u003ch3\u003eAdvanced Design for EVO Engines\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e16% silicon hypereutectic alloy reduces thermal expansion\u003c\/li\u003e\n\u003cli\u003eAllows for tighter piston-to-cylinder clearances for better seal\u003c\/li\u003e\n\u003cli\u003eDesigned for stock to mild compression ratios up to 10.5:1\u003c\/li\u003e\n\u003cli\u003e.020 inch oversize for rebuilding cylinders\u003c\/li\u003e\n\u003cli\u003eOptimized for air-cooled Harley-Davidson Evolution 80ci engines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eRestore Power and Reliability\u003c\/h3\u003e\u003cp\u003eThese pistons are an excellent choice for riders undertaking a full engine rebuild on their Evolution 80ci. The .020 inch oversize requires cylinder boring, ensuring a fresh sealing surface and optimal performance. They are engineered to deliver consistent power and a long service life, whether your bike is a Touring, Softail, or Dyna model, keeping you on the road with confidence.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB258.020\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745060389\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 8.6:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBore Size:\u003c\/strong\u003e .020 over\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine Displacement:\u003c\/strong\u003e 80 cubic inches (EVO)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.65 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat does \".020 over\" mean for these pistons?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003e.020 over means the piston is sized .020 inches larger than the standard bore. This requires your cylinders to be bored out to match the new piston size during an engine rebuild, creating a fresh surface for optimal ring seal.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eAre these pistons suitable for high-performance builds with forced induction?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThese hypereutectic pistons are rated for stock to mild compression ratios up to 10.5:1 on pump fuel. For higher compression, forced induction, or race fuel applications, forged pistons specifically designed for those conditions are generally recommended.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWill these pistons fit my specific Harley Evolution 80ci model?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThese pistons are designed for Harley Evolution 80 cubic inch air-cooled engines found in various Touring, Softail, and Dyna models. It is crucial to confirm fitment for your exact year and model before ordering and ensure your cylinders are machined to the correct oversize.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Hypereutectic Cast Piston 8.6:1 .020 Over - Harley Evolution 80ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-hypereutectic-cast-piston-pistons-evo-80ci-8-6-3\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What does \\\".020 over\\\" mean for these pistons?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\".020 over means the piston is sized .020 inches larger than the standard bore. This requires your cylinders to be bored out to match the new piston size during an engine rebuild, creating a fresh surface for optimal ring seal.\"}},{\"@type\":\"Question\",\"name\":\"Are these pistons suitable for high-performance builds with forced induction?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"These hypereutectic pistons are rated for stock to mild compression ratios up to 10.5:1 on pump fuel. For higher compression, forced induction, or race fuel applications, forged pistons specifically designed for those conditions are generally recommended.\"}},{\"@type\":\"Question\",\"name\":\"Will these pistons fit my specific Harley Evolution 80ci model?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"These pistons are designed for Harley Evolution 80 cubic inch air-cooled engines found in various Touring, Softail, and Dyna models. It is crucial to confirm fitment for your exact year and model before ordering and ensure your cylinders are machined to the correct oversize.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035460264047,"sku":"824-01003","price":243.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_da90d107-dceb-40c3-aca3-3e3e631b418b.png?v=1779561824"},{"product_id":"kb-pistons-hypereutectic-cast-piston-pistons-evo-80ci-9-6-1-005-824-01007","title":"Kb Pistons Hypereutectic Cast Piston 9.6:1 .005 - Harley Evolution 80ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eUnleash the full potential of your Evolution 80ci engine with KB Pistons Hypereutectic Cast Pistons. Engineered for riders who demand superior thermal performance and a quieter, more efficient power plant, these pistons are designed to elevate your ride.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003e16% silicon hypereutectic alloy reduces thermal expansion\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eTight piston-to-cylinder clearances for quiet operation\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eOptimized ring seal improves power and efficiency\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eIdeal for stock and mild compression ratios\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eDesigned for air-cooled Harley Evolution 80ci engines\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese hypereutectic cast pistons feature a specialized 16% silicon content alloy, drastically reducing thermal expansion. This allows for tighter piston-to-cylinder wall clearances in your air-cooled V-twin, leading to improved ring seal and a noticeable reduction in engine noise.\u003c\/p\u003e\u003ch3\u003eEngineered for Durability and Performance\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eAdvanced 16% silicon hypereutectic alloy for superior thermal stability\u003c\/li\u003e\n\u003cli\u003eDesigned for tight piston-to-cylinder clearances to minimize blowby\u003c\/li\u003e\n\u003cli\u003eDelivers optimal ring seal for consistent power delivery\u003c\/li\u003e\n\u003cli\u003eReduces engine noise and wear in air-cooled big twins\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOptimized for Your EVO Build\u003c\/h3\u003e\u003cp\u003eWhether you're refreshing a stock Evolution 80ci or building a mild custom, these pistons are an ideal choice. The 9.6:1 compression ratio is perfect for pump fuel applications, providing reliable power without demanding exotic fuels. Ensure your cylinders are bored to the .005 over specification for a perfect fit and long-lasting performance.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB305.005\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745130068\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 9.6:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine:\u003c\/strong\u003e EVO 80ci\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 9.5 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 4.8 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 4.6 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.75 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat compression ratio do these pistons provide?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThese KB Pistons are designed for a 9.6:1 compression ratio, suitable for stock and mild builds up to 10.5:1 on pump fuel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWill these pistons fit my Evolution 80ci engine?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eYes, these pistons are specifically designed for air-cooled Evolution 80ci engines. Please confirm the .005 overbore requirement with your cylinder measurements.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhy choose hypereutectic pistons for an air-cooled engine?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThe 16% silicon content in hypereutectic pistons provides excellent thermal stability and low expansion, allowing for tighter piston-to-cylinder clearances that reduce noise and wear in air-cooled applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Hypereutectic Cast Piston 9.6:1 .005 - Harley Evolution 80ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-hypereutectic-cast-piston-pistons-evo-80ci-9-6-7\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What compression ratio do these pistons provide?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"These KB Pistons are designed for a 9.6:1 compression ratio, suitable for stock and mild builds up to 10.5:1 on pump fuel.\"}},{\"@type\":\"Question\",\"name\":\"Will these pistons fit my Evolution 80ci engine?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, these pistons are specifically designed for air-cooled Evolution 80ci engines. Please confirm the .005 overbore requirement with your cylinder measurements.\"}},{\"@type\":\"Question\",\"name\":\"Why choose hypereutectic pistons for an air-cooled engine?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The 16% silicon content in hypereutectic pistons provides excellent thermal stability and low expansion, allowing for tighter piston-to-cylinder clearances that reduce noise and wear in air-cooled applications.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035460362351,"sku":"824-01007","price":254.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_4ceabdbe-1118-49f9-94f9-18632889c8d2.png?v=1779561988"},{"product_id":"kb-pistons-hypereutectic-cast-piston-pistons-evo-80ci-9-6-1-010-824-01008","title":"Kb Pistons Hypereutectic Cast Piston 9.6:1 .010 - Harley Evolution 80ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eUpgrade your Evolution 80ci engine with KB Pistons Hypereutectic Cast Pistons, precisely engineered for riders seeking improved thermal management and reduced engine noise. These pistons deliver a reliable foundation for your air-cooled V-twin performance build.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003eAdvanced 16% silicon hypereutectic alloy\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eLow thermal expansion for tight clearances\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eReduces engine noise and wear\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eOptimal ring seal for efficiency\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003e9.6:1 compression for pump fuel applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCrafted from a 16% silicon hypereutectic alloy, these pistons boast superior thermal stability and minimal expansion. This advanced material allows for tighter piston-to-cylinder wall clearances, which translates directly to a better ring seal, less blowby, and a quieter running engine – crucial for air-cooled Harley-Davidson applications.\u003c\/p\u003e\u003ch3\u003eOptimized for Air-Cooled Performance\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e16% silicon hypereutectic alloy resists thermal expansion\u003c\/li\u003e\n\u003cli\u003eEnables tighter piston-to-cylinder clearances\u003c\/li\u003e\n\u003cli\u003eReduces blowby and mechanical engine noise\u003c\/li\u003e\n\u003cli\u003ePromotes optimal ring seal for consistent power\u003c\/li\u003e\n\u003cli\u003eDesigned for durability in air-cooled EVO 80ci engines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe Foundation of a Solid Build\u003c\/h3\u003e\u003cp\u003eWith a 9.6:1 compression ratio, these pistons are perfectly suited for stock or mild Evolution 80ci engine builds running on pump fuel. The .010 oversized dimension is ideal for cylinders that have been bored out, ensuring a fresh, precise fit. Invest in these pistons for a dependable, long-lasting engine refresh that enhances both performance and longevity.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB305.010\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745130075\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine:\u003c\/strong\u003e EVO 80ci\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 9.6:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOversized:\u003c\/strong\u003e .010 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 9.6 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 4.8 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 4.6 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.8 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat compression ratio is this piston designed for?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThis piston is designed for a 9.6:1 compression ratio, ideal for stock to mild builds up to 10.5:1 on pump fuel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhy is the .010 overbore significant?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThe .010 overbore size means these pistons are designed for cylinders that have been bored out slightly to clean up wear or damage, providing a fresh, tight fit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eAre these pistons suitable for high-performance builds?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThese hypereutectic pistons are best suited for stock to mild compression ratio builds up to 10.5:1. For higher compression or forced induction applications, forged pistons are typically recommended.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Hypereutectic Cast Piston 9.6:1 .010 - Harley Evolution 80ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-hypereutectic-cast-piston-pistons-evo-80ci-9-6-8\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What compression ratio is this piston designed for?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This piston is designed for a 9.6:1 compression ratio, ideal for stock to mild builds up to 10.5:1 on pump fuel.\"}},{\"@type\":\"Question\",\"name\":\"Why is the .010 overbore significant?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The .010 overbore size means these pistons are designed for cylinders that have been bored out slightly to clean up wear or damage, providing a fresh, tight fit.\"}},{\"@type\":\"Question\",\"name\":\"Are these pistons suitable for high-performance builds?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"These hypereutectic pistons are best suited for stock to mild compression ratio builds up to 10.5:1. For higher compression or forced induction applications, forged pistons are typically recommended.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035461148783,"sku":"824-01008","price":254.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_abd7a54b-0f28-4ca6-b2f2-c2ddc9576795.png?v=1779561829"},{"product_id":"kb-pistons-hypereutectic-cast-piston-pistons-evo-80ci-10-5-1-005-824-01013","title":"Kb Pistons Hypereutectic Cast Piston 10.5:1 .005 - Harley Evolution 80ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eElevate your Evolution 80ci engine's performance with KB Pistons Hypereutectic Cast Pistons. Engineered for riders seeking a boost in compression without sacrificing durability, these pistons are a solid choice for a more aggressive street machine.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003e16% silicon hypereutectic alloy for stability\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eLow thermal expansion allows tight clearances\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eOptimized for 10.5:1 compression ratio\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eReduces engine noise and wear\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eDesigned for air-cooled Harley Evolution 80ci\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese pistons are crafted from a specialized 16% silicon hypereutectic alloy, which provides exceptional thermal stability and minimal expansion. This allows for tighter piston-to-cylinder wall clearances, critical for air-cooled engines, resulting in improved ring seal, reduced blowby, and a quieter, more efficient power delivery.\u003c\/p\u003e\u003ch3\u003ePerformance-Oriented Design\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e16% silicon hypereutectic alloy for reduced thermal expansion\u003c\/li\u003e\n\u003cli\u003eDesigned for tight piston-to-cylinder wall clearance\u003c\/li\u003e\n\u003cli\u003eOptimal ring seal for improved engine efficiency\u003c\/li\u003e\n\u003cli\u003eReduces engine noise and wear in air-cooled applications\u003c\/li\u003e\n\u003cli\u003eRated for 10.5:1 compression, suitable for pump fuel\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eBuilding for Power and Reliability\u003c\/h3\u003e\u003cp\u003eWith a 10.5:1 compression ratio, these pistons are ideal for Evolution 80ci builds looking to unlock more power while remaining compatible with pump fuel. The .005 oversized bore ensures a precise fit for cylinders that have been reconditioned, providing a fresh sealing surface and maximizing engine longevity. Pair these with a performance cam for a noticeable improvement in throttle response and torque.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB266.005\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745061362\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 10.5:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine Displacement:\u003c\/strong\u003e 80 cubic inches (EVO)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOversized:\u003c\/strong\u003e .005 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 9.6 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 4.8 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 4.6 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.65 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat compression ratio do these pistons support?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThese KB Pistons are rated for a 10.5:1 compression ratio, making them suitable for performance builds running on pump fuel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWill these fit my stock Evolution 80ci cylinders?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThese pistons are .005 oversized, meaning your cylinders will need to be bored to this specification for proper fitment. Consult your mechanic or machine shop.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhy are hypereutectic pistons beneficial for air-cooled engines?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThe high silicon content in hypereutectic pistons reduces thermal expansion, allowing for tighter piston-to-cylinder clearances that improve ring seal and reduce noise and wear, which is particularly advantageous for air-cooled V-twins.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Hypereutectic Cast Piston 10.5:1 .005 - Harley Evolution 80ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-hypereutectic-cast-piston-pistons-evo-80ci-10-5-3\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What compression ratio do these pistons support?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"These KB Pistons are rated for a 10.5:1 compression ratio, making them suitable for performance builds running on pump fuel.\"}},{\"@type\":\"Question\",\"name\":\"Will these fit my stock Evolution 80ci cylinders?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"These pistons are .005 oversized, meaning your cylinders will need to be bored to this specification for proper fitment. Consult your mechanic or machine shop.\"}},{\"@type\":\"Question\",\"name\":\"Why are hypereutectic pistons beneficial for air-cooled engines?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The high silicon content in hypereutectic pistons reduces thermal expansion, allowing for tighter piston-to-cylinder clearances that improve ring seal and reduce noise and wear, which is particularly advantageous for air-cooled V-twins.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035461181551,"sku":"824-01013","price":254.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_5e74a15d-0c2a-4a86-8945-710da4a1d12f.png?v=1779565566"},{"product_id":"kb-pistons-hypereutectic-cast-piston-pistons-evo-80ci-9-6-1-020-824-01009","title":"Kb Pistons Hypereutectic Cast Piston 9.6:1 .020 - Harley Evolution 80ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eGive your Evolution 80ci engine a new lease on life with KB Pistons Hypereutectic Cast Pistons. Engineered for riders who demand a durable and efficient engine refresh, these pistons are designed to perform reliably in your air-cooled V-twin.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003e16% silicon hypereutectic alloy\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eLow thermal expansion for tight clearances\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eOptimized ring seal and reduced engine noise\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eIdeal for stock to mild compression builds\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eDesigned for air-cooled Harley Evolution 80ci\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese hypereutectic cast pistons incorporate a 16% silicon content alloy, specifically chosen for its superior thermal properties and minimal expansion. This advanced material allows for tighter piston-to-cylinder wall clearances, leading to an optimal ring seal, reduced blowby, and a significantly quieter running engine, which is essential for air-cooled Harley-Davidson applications.\u003c\/p\u003e\u003ch3\u003eBuilt for Reliable Performance\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e16% silicon hypereutectic alloy for excellent thermal stability\u003c\/li\u003e\n\u003cli\u003eMaintains tight piston-to-cylinder clearances\u003c\/li\u003e\n\u003cli\u003eEnsures optimal ring seal and reduced engine wear\u003c\/li\u003e\n\u003cli\u003eDesigned for quieter operation in air-cooled EVO engines\u003c\/li\u003e\n\u003cli\u003eSuitable for stock and mild compression ratios up to 10.5:1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eA Solid Choice for Your EVO Rebuild\u003c\/h3\u003e\u003cp\u003eWith a 9.6:1 compression ratio, these pistons are perfect for refreshing an Evolution 80ci engine or building a mild custom. The .020 oversized bore is designed for cylinders that have undergone machining, providing a clean and precise fit. These pistons offer a robust foundation for a long-lasting engine that delivers consistent power on pump fuel.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB305.020\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745130082\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDisplacement:\u003c\/strong\u003e EVO 80ci\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 9.6:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOversized:\u003c\/strong\u003e .020 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.8 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWill this piston work with my high-compression EVO build?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eNo, KB Hypereutectic pistons are rated for compression ratios up to 10.5:1. High-compression builds over 10.5:1 typically require forged pistons.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat compression ratio does this piston provide?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThis piston is designed for a 9.6:1 compression ratio, suitable for stock or mild builds up to 10.5:1 on pump fuel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eIs the .020 oversized bore a direct bolt-on?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eNo, the .020 oversized bore means your cylinders will need to be machined to this specific dimension for proper piston fitment. This is typically done during an engine rebuild.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Hypereutectic Cast Piston 9.6:1 .020 - Harley Evolution 80ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-hypereutectic-cast-piston-pistons-evo-80ci-9-6-9\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Will this piston work with my high-compression EVO build?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No, KB Hypereutectic pistons are rated for compression ratios up to 10.5:1. High-compression builds over 10.5:1 typically require forged pistons.\"}},{\"@type\":\"Question\",\"name\":\"What compression ratio does this piston provide?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This piston is designed for a 9.6:1 compression ratio, suitable for stock or mild builds up to 10.5:1 on pump fuel.\"}},{\"@type\":\"Question\",\"name\":\"Is the .020 oversized bore a direct bolt-on?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No, the .020 oversized bore means your cylinders will need to be machined to this specific dimension for proper piston fitment. This is typically done during an engine rebuild.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035461214319,"sku":"824-01009","price":254.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_db1e0c7b-29e5-4b01-8b05-21152a071e69.png?v=1779561983"},{"product_id":"kb-pistons-hypereutectic-cast-piston-pistons-evo-80ci-10-5-1-010-824-01014","title":"Kb Pistons Hypereutectic Cast Piston 10.5:1 .010 - Harley Evolution 80ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eMaximize the output of your Evolution 80ci engine with KB Pistons Hypereutectic Cast Pistons. Designed for riders seeking a noticeable increase in compression and power, these pistons provide a robust foundation for your V-twin's performance aspirations.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003e16% silicon hypereutectic alloy\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eLow thermal expansion for tight clearances\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eOptimized for 10.5:1 compression ratio\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eReduces engine wear and noise\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eDesigned for air-cooled Harley Evolution 80ci\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese pistons are meticulously cast from a 16% silicon hypereutectic alloy, a material renowned for its low thermal expansion and exceptional stability. This allows for tighter piston-to-cylinder wall clearances, which is paramount for air-cooled engines, ensuring an optimal ring seal, reduced blowby, and a quieter, more efficient engine operation with less wear.\u003c\/p\u003e\u003ch3\u003eEngineered for Performance and Longevity\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e16% silicon hypereutectic alloy for minimal thermal expansion\u003c\/li\u003e\n\u003cli\u003eEnables tight piston-to-cylinder wall clearances\u003c\/li\u003e\n\u003cli\u003ePromotes optimal ring seal and reduced engine wear\u003c\/li\u003e\n\u003cli\u003eDesigned for 10.5:1 compression ratio\u003c\/li\u003e\n\u003cli\u003eSuitable for air-cooled Harley Evolution 80ci engines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eUnlock More Power\u003c\/h3\u003e\u003cp\u003eWith a 10.5:1 compression ratio, these pistons are an excellent choice for Evolution 80ci builds aiming for increased power while remaining compatible with standard pump fuel. The .010 oversized bore is ideal for cylinders that have been reconditioned, ensuring a precise and durable fit. Combine these pistons with other performance upgrades like a cam swap for a truly transformative riding experience.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB266.010\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745061409\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 10.5:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBore Size:\u003c\/strong\u003e .010 oversized\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine:\u003c\/strong\u003e EVO 80ci\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.7 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat compression ratio are these pistons rated for?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThese KB Pistons are rated for a 10.5:1 compression ratio, making them ideal for performance builds running on pump fuel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWill these work in a high-compression or boosted engine?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eNo, hypereutectic pistons are designed for stock to mild compression ratios. For higher compression or forced induction applications, forged pistons are recommended for their increased strength.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eDo I need to machine my cylinders for these pistons?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eYes, these pistons are .010 oversized, meaning your cylinders will need to be bored and honed to this specific dimension for proper fitment during an engine rebuild.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Hypereutectic Cast Piston 10.5:1 .010 - Harley Evolution 80ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-hypereutectic-cast-piston-pistons-evo-80ci-10-5-4\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What compression ratio are these pistons rated for?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"These KB Pistons are rated for a 10.5:1 compression ratio, making them ideal for performance builds running on pump fuel.\"}},{\"@type\":\"Question\",\"name\":\"Will these work in a high-compression or boosted engine?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No, hypereutectic pistons are designed for stock to mild compression ratios. For higher compression or forced induction applications, forged pistons are recommended for their increased strength.\"}},{\"@type\":\"Question\",\"name\":\"Do I need to machine my cylinders for these pistons?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, these pistons are .010 oversized, meaning your cylinders will need to be bored and honed to this specific dimension for proper fitment during an engine rebuild.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035461279855,"sku":"824-01014","price":254.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_8cfeade2-97f7-45a2-b168-2546b62c19bd.png?v=1779561830"},{"product_id":"kb-pistons-hypereutectic-cast-piston-pistons-shovel-80ci-7-2-1-std-824-01150","title":"Kb Pistons Hypereutectic Cast Piston 7.2:1 Standard - Harley Shovelhead 80ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eReinvigorate your Shovelhead 80ci engine with KB Pistons Hypereutectic Cast Pistons. Designed for riders seeking to maintain or restore original compression with enhanced durability, these pistons are a smart choice for a reliable rebuild.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003e16% silicon hypereutectic alloy\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eHigh thermal stability and low expansion\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eTight piston-to-cylinder clearances\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eReduces engine wear and noise\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003e7.2:1 compression for Shovelhead 80ci\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese hypereutectic cast pistons are formulated with a 16% silicon content alloy, which is key to their high thermal stability and minimal expansion. This advanced composition allows for tighter piston-to-cylinder wall clearances, crucial for air-cooled engines, leading to improved ring seal, reduced blowby, and a quieter, more efficient running engine with less wear over time.\u003c\/p\u003e\u003ch3\u003eBuilt for Classic V-Twin Reliability\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e16% silicon hypereutectic alloy for high thermal stability\u003c\/li\u003e\n\u003cli\u003eLow thermal expansion allows tight piston-to-cylinder clearances\u003c\/li\u003e\n\u003cli\u003eReduces engine wear and mechanical noise\u003c\/li\u003e\n\u003cli\u003eOptimal ring seal for consistent power delivery\u003c\/li\u003e\n\u003cli\u003eSuitable for stock to mild compression ratios up to 10.5:1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eAuthentic Performance for Your Shovelhead\u003c\/h3\u003e\u003cp\u003eWith a 7.2:1 compression ratio and standard bore, these pistons are perfect for restoring your Shovelhead 80ci engine to its original specifications or for a mild performance build. They are designed to operate efficiently on pump fuel, ensuring your classic V-twin runs reliably. Pair these pistons with a cylinder refresh for a complete top-end overhaul that brings new life to your ride.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB288.STD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745063618\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine:\u003c\/strong\u003e Shovelhead 80ci\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 7.2:1 Standard\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 9.5 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 4.8 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 4.6 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.5 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat compression ratio is this piston rated for?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThis piston is rated for 7.2:1 standard compression, suitable for stock to mild ratios up to 10.5:1 on pump fuel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhy is the silicon content important in these pistons?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThe 16% silicon content provides high thermal stability and low expansion, allowing for tighter piston-to-cylinder clearances that reduce noise and wear, which is particularly beneficial for air-cooled Shovelhead engines.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWill these pistons fit my Shovelhead 80ci engine?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eYes, these pistons are designed for Shovelhead 80ci engines at standard bore. Always confirm your cylinder bore measurements before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Hypereutectic Cast Piston 7.2:1 Standard - Harley Shovelhead 80ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-hypereutectic-cast-piston-pistons-shovel-80ci-7-2-1-std-824-01150\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What compression ratio is this piston rated for?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This piston is rated for 7.2:1 standard compression, suitable for stock to mild ratios up to 10.5:1 on pump fuel.\"}},{\"@type\":\"Question\",\"name\":\"Why is the silicon content important in these pistons?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The 16% silicon content provides high thermal stability and low expansion, allowing for tighter piston-to-cylinder clearances that reduce noise and wear, which is particularly beneficial for air-cooled Shovelhead engines.\"}},{\"@type\":\"Question\",\"name\":\"Will these pistons fit my Shovelhead 80ci engine?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, these pistons are designed for Shovelhead 80ci engines at standard bore. Always confirm your cylinder bore measurements before ordering.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035462066287,"sku":"824-01150","price":254.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_9c20ba34-e7c2-4c59-aaf1-55aa33a62605.png?v=1779561831"},{"product_id":"kb-pistons-hypereutectic-cast-piston-pistons-shovel-80ci-7-2-1-005-824-01151","title":"Kb Pistons Hypereutectic Cast Piston 7.2:1 .005 - Harley Shovelhead 80ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eUnleash the full potential of your Shovelhead 80ci engine with the Kb Pistons Hypereutectic Cast Piston. These pistons are engineered for optimal performance in air-cooled V-twin motors, providing a significant upgrade for riders chasing reliable power.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003e16% silicon hypereutectic alloy construction\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eLow thermal expansion for tight clearances\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eOptimized 7.2:1 compression ratio\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eEnhanced ring seal and reduced engine noise\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eDesigned for stock to mild builds on pump fuel\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese Kb Pistons Hypereutectic Cast Pistons are specifically designed for Shovelhead 80ci engines, built with a 7.2:1 compression ratio and a .005 oversize. The advanced hypereutectic alloy, featuring 16% silicon content, ensures minimal thermal expansion and tight piston-to-cylinder clearance. This translates to a quieter running engine with superior ring seal, making them ideal for stock and mild compression builds that run on pump fuel.\u003c\/p\u003e\u003ch3\u003eEngineered for Performance and Durability\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eHigh 16% silicon content in hypereutectic alloy for resilience\u003c\/li\u003e\n\u003cli\u003eLow thermal expansion rate allows for tighter piston-to-cylinder clearance\u003c\/li\u003e\n\u003cli\u003eOptimized ring seal for improved engine efficiency\u003c\/li\u003e\n\u003cli\u003eReduced engine noise for a smoother ride\u003c\/li\u003e\n\u003cli\u003eSuitable for stock to mild compression ratios on pump fuel\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe Foundation for a Strong Shovelhead Build\u003c\/h3\u003e\u003cp\u003eWhether you're rebuilding a classic or upgrading for better street manners, these pistons provide a solid foundation. The precise manufacturing ensures a straightforward installation for experienced builders. Pair them with a fresh top-end gasket kit and a careful break-in for lasting performance on your Harley Touring, Softail, or Dyna Shovelhead.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB288.005\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745063632\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine:\u003c\/strong\u003e Shovelhead 80ci\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 7.2:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClearance:\u003c\/strong\u003e .005 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.5 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat compression ratio is this piston designed for?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThis piston is designed for a 7.2:1 compression ratio, ideal for stock to mild compression air-cooled Shovelhead 80ci engines running on pump fuel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat does '.005' refer to?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThe '.005' indicates that the piston is .005 inches larger than the standard bore. Your cylinders will need to be machined to this precise oversize for proper fitment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWill these pistons improve engine noise?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eYes, the hypereutectic alloy's low thermal expansion allows for tighter piston-to-cylinder clearance, which can contribute to reduced engine noise and quieter operation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Hypereutectic Cast Piston 7.2:1 .005 - Harley Shovelhead 80ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-hypereutectic-cast-piston-pistons-shovel-80ci-7-2-1\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What compression ratio is this piston designed for?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This piston is designed for a 7.2:1 compression ratio, ideal for stock to mild compression air-cooled Shovelhead 80ci engines running on pump fuel.\"}},{\"@type\":\"Question\",\"name\":\"What does '.005' refer to?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The '.005' indicates that the piston is .005 inches larger than the standard bore. Your cylinders will need to be machined to this precise oversize for proper fitment.\"}},{\"@type\":\"Question\",\"name\":\"Will these pistons improve engine noise?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, the hypereutectic alloy's low thermal expansion allows for tighter piston-to-cylinder clearance, which can contribute to reduced engine noise and quieter operation.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035462164591,"sku":"824-01151","price":254.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_076c5d26-720a-455c-b817-e5441342db59.png?v=1779563102"},{"product_id":"kb-pistons-hypereutectic-cast-piston-pistons-shovel-80ci-7-2-1-010-824-01152","title":"Kb Pistons Hypereutectic Cast Piston 7.2:1 .010 - Harley Shovelhead 80ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eEnhance the performance and longevity of your Shovelhead 80ci engine with the Kb Pistons Hypereutectic Cast Piston. Crafted from a high-silicon alloy, these pistons are designed to manage thermal expansion effectively in air-cooled V-twin powerplants.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003e16% silicon hypereutectic alloy construction\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eLow thermal expansion for tight clearances\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eOptimized 7.2:1 compression ratio\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eEnhanced ring seal and reduced engine noise\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eDesigned for stock to mild builds on pump fuel\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese Kb Pistons Hypereutectic Cast Pistons are engineered for Shovelhead 80ci engines, featuring a 7.2:1 compression ratio and a .010 oversize. The specific 16% silicon content in the hypereutectic alloy is key to its performance, allowing for minimal thermal expansion. This characteristic enables tighter piston-to-cylinder clearances, which in turn promotes an excellent ring seal and reduces engine noise for a smoother, more efficient operation. They are perfectly suited for stock to mild compression builds using pump fuel.\u003c\/p\u003e\u003ch3\u003eAdvanced Alloy for Air-Cooled Efficiency\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e16% silicon hypereutectic alloy resists thermal expansion\u003c\/li\u003e\n\u003cli\u003eMaintains tight piston-to-cylinder clearance\u003c\/li\u003e\n\u003cli\u003eOptimized ring seal for consistent power delivery\u003c\/li\u003e\n\u003cli\u003eReduces engine noise for a more refined ride\u003c\/li\u003e\n\u003cli\u003eRated for stock to mild compression ratios on pump fuel\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eA Smart Choice for Your Shovelhead Rebuild\u003c\/h3\u003e\u003cp\u003eSelecting the right piston is crucial for any engine build. These Kb Pistons offer a robust solution for Shovelhead 80ci motors, providing the thermal stability needed for air-cooled applications. Ensure your cylinders are bored to the .010 oversize for a precise fit and optimal performance. They are an excellent choice for riders looking for reliable power and improved efficiency on their Harley Touring, Softail, or Dyna models.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB288.010\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745063656\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBore Size:\u003c\/strong\u003e .010 over\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 7.2:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine Displacement:\u003c\/strong\u003e 80 cubic inches (Shovel)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.5 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat compression ratio is this piston suited for?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThis piston is designed for a 7.2:1 compression ratio, ideal for stock to mild compression air-cooled Shovelhead 80ci engines running on pump fuel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat does '.010 over' mean?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThe '.010 over' indicates that the piston is .010 inches larger than the standard bore. Your cylinders will need to be machined to this precise oversize for proper fitment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWill these pistons improve engine noise?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eYes, the hypereutectic alloy's low thermal expansion allows for tighter piston-to-cylinder clearance, which can contribute to reduced engine noise and quieter operation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Hypereutectic Cast Piston 7.2:1 .010 - Harley Shovelhead 80ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-hypereutectic-cast-piston-pistons-shovel-80ci-7-2-2\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What compression ratio is this piston suited for?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This piston is designed for a 7.2:1 compression ratio, ideal for stock to mild compression air-cooled Shovelhead 80ci engines running on pump fuel.\"}},{\"@type\":\"Question\",\"name\":\"What does '.010 over' mean?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The '.010 over' indicates that the piston is .010 inches larger than the standard bore. Your cylinders will need to be machined to this precise oversize for proper fitment.\"}},{\"@type\":\"Question\",\"name\":\"Will these pistons improve engine noise?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, the hypereutectic alloy's low thermal expansion allows for tighter piston-to-cylinder clearance, which can contribute to reduced engine noise and quieter operation.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035462131823,"sku":"824-01152","price":254.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_bc1b12f5-86cf-4c28-b9ca-7d3a41da5f79.png?v=1779561987"},{"product_id":"kb-pistons-hypereutectic-cast-piston-pistons-shovel-80ci-8-3-1-020-824-01159","title":"Kb Pistons Hypereutectic Cast Piston 8.3:1 .020 - Harley Shovelhead 80ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eUpgrade your Harley Shovelhead 80ci engine with the Kb Pistons Hypereutectic Cast Piston, designed for an 8.3:1 compression ratio. These pistons are precision-machined to a .020 oversize, offering a significant improvement for your V-twin powerplant.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003e16% silicon hypereutectic alloy construction\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eLow thermal expansion for tight clearances\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eOptimized 8.3:1 compression ratio\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eEnhanced ring seal and reduced engine noise\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eDesigned for stock to mild builds on pump fuel\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese Kb Pistons Hypereutectic Cast Pistons are crafted for Harley Shovelhead 80ci engines, providing an 8.3:1 compression ratio and a .020 oversize. The advanced 16% silicon-content hypereutectic alloy is engineered to resist thermal expansion, allowing for a tighter piston-to-wall clearance. This critical feature translates to improved ring seal and quieter operation, essential for the demands of air-cooled engines. They are optimized for stock to mild compression ratios up to 10.5:1 and perform best with pump fuel.\u003c\/p\u003e\u003ch3\u003eOptimized Design for Shovelhead Power\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eHypereutectic alloy with 16% silicon content for thermal stability\u003c\/li\u003e\n\u003cli\u003eLow thermal expansion enables tight piston-to-cylinder clearance\u003c\/li\u003e\n\u003cli\u003eEnhanced ring seal for consistent performance\u003c\/li\u003e\n\u003cli\u003eQuiet engine operation from precise fitment\u003c\/li\u003e\n\u003cli\u003eSuitable for stock to mild compression ratios on pump fuel\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eBuild Your Shovelhead Right\u003c\/h3\u003e\u003cp\u003eChoosing the correct piston is fundamental for a reliable and powerful Shovelhead engine. This Kb Piston, with its .020 oversize, requires your cylinders to be bored and honed to match for optimal fitment. This ensures maximum efficiency and longevity for your motor. Ideal for riders looking to rebuild or upgrade their Harley Touring, Softail, or Dyna Shovelhead for improved street performance.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB297.020\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745064479\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 8.3:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOversize:\u003c\/strong\u003e .020\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine Displacement:\u003c\/strong\u003e 80ci (Shovel)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.5 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat compression ratio is this piston rated for?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThis piston is rated for an 8.3:1 compression ratio, suitable for stock to mild builds up to 10.5:1 on pump fuel for Shovelhead 80ci engines.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat does '.020 oversize' mean?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThe '.020 oversize' means the piston is .020 inches larger than the standard bore. Your cylinders will require machining to this exact size for proper fitment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eAre these pistons compatible with high-performance builds?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThese hypereutectic pistons are best suited for stock to mild compression ratios up to 10.5:1. For higher performance or racing applications, consult with a builder.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Hypereutectic Cast Piston 8.3:1 .020 - Harley Shovelhead 80ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-hypereutectic-cast-piston-pistons-shovel-80ci-8-3-9\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What compression ratio is this piston rated for?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This piston is rated for an 8.3:1 compression ratio, suitable for stock to mild builds up to 10.5:1 on pump fuel for Shovelhead 80ci engines.\"}},{\"@type\":\"Question\",\"name\":\"What does '.020 oversize' mean?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The '.020 oversize' means the piston is .020 inches larger than the standard bore. Your cylinders will require machining to this exact size for proper fitment.\"}},{\"@type\":\"Question\",\"name\":\"Are these pistons compatible with high-performance builds?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"These hypereutectic pistons are best suited for stock to mild compression ratios up to 10.5:1. For higher performance or racing applications, consult with a builder.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035462197359,"sku":"824-01159","price":254.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_c79f1c49-97d1-43cd-80d4-30aac49d355a.png?v=1779561992"},{"product_id":"kb-pistons-hypereutectic-cast-piston-pistons-shovel-88-89ci-std-824-01162","title":"Kb Pistons Hypereutectic Cast Piston Standard - Harley Shovelhead 88-89ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eOptimize your Shovelhead 88-89 cubic inch engine with the Kb Pistons Hypereutectic Cast Piston. Engineered for superior thermal management and a precise fit, these pistons are an excellent choice for a reliable V-twin powerplant.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003e16% silicon hypereutectic alloy construction\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eLow thermal expansion for tight clearances\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eOptimal ring seal and reduced wear\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eQuiet engine operation\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eDesigned for stock to mild builds on pump fuel\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese Kb Pistons Hypereutectic Cast Pistons are designed for Shovelhead 88-89 cubic inch engines in standard bore size. Featuring a robust 16% silicon content, the hypereutectic alloy delivers exceptional low thermal expansion. This characteristic is crucial for maintaining tight piston-to-cylinder clearance, which translates to optimal ring seal, reduced wear, and quieter engine operation in air-cooled motors. They are ideal for stock and mild compression builds that run efficiently on pump fuel.\u003c\/p\u003e\u003ch3\u003ePrecision Engineering for Shovelhead Reliability\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eHypereutectic 16% silicon alloy for thermal stability\u003c\/li\u003e\n\u003cli\u003eLow thermal expansion rate ensures tight piston-to-cylinder clearance\u003c\/li\u003e\n\u003cli\u003eOptimized ring seal for consistent compression\u003c\/li\u003e\n\u003cli\u003eReduced engine wear for extended longevity\u003c\/li\u003e\n\u003cli\u003eQuiet engine operation from precise fitment\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe Right Piston for Your Shovelhead\u003c\/h3\u003e\u003cp\u003eWhether you're performing a standard rebuild or a mild performance upgrade, these Kb Pistons provide the foundation for a strong running Shovelhead 88-89ci engine. The cast construction ensures durability for street use. For optimal performance, ensure your cylinders are within standard specifications. These pistons are a solid choice for Harley Touring, Softail, or Dyna riders looking for dependable power and a smooth ride.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB294.STD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745064073\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine:\u003c\/strong\u003e Shovel 88–89 ci\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e Standard\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 9.5 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 4.8 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 4.6 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.5 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat compression ratio are these pistons best suited for?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThese pistons are best suited for stock to mild compression ratios up to 10.5:1, designed for Shovelhead 88-89ci engines running on pump fuel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eDo these pistons require any special machining?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThese are standard-size pistons. If your cylinders are within factory specifications, they typically will not require special machining beyond a standard hone for proper ring seating.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhy choose hypereutectic over forged pistons for my Shovelhead?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eHypereutectic pistons offer excellent thermal stability due to their high silicon content, leading to lower expansion, tighter clearances, and quieter operation, which is beneficial for air-cooled V-twin engines.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Hypereutectic Cast Piston Standard - Harley Shovelhead 88-89ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-hypereutectic-cast-piston-pistons-shovel-88-89ci-std-824-01162\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What compression ratio are these pistons best suited for?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"These pistons are best suited for stock to mild compression ratios up to 10.5:1, designed for Shovelhead 88-89ci engines running on pump fuel.\"}},{\"@type\":\"Question\",\"name\":\"Do these pistons require any special machining?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"These are standard-size pistons. If your cylinders are within factory specifications, they typically will not require special machining beyond a standard hone for proper ring seating.\"}},{\"@type\":\"Question\",\"name\":\"Why choose hypereutectic over forged pistons for my Shovelhead?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Hypereutectic pistons offer excellent thermal stability due to their high silicon content, leading to lower expansion, tighter clearances, and quieter operation, which is beneficial for air-cooled V-twin engines.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035463016559,"sku":"824-01162","price":307.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_c421d50f-c818-45cb-b244-65f5f0d9b354.png?v=1779561992"},{"product_id":"kb-pistons-hypereutectic-cast-piston-pistons-shovel-88-89ci-020-824-01165","title":"Kb Pistons Hypereutectic Cast Piston .020 - Harley Shovelhead 88-89ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eMaximize the performance and durability of your Shovelhead 88-89ci engine with the Kb Pistons Hypereutectic Cast Piston. These pistons are engineered with advanced materials to deliver a tight ring seal and quieter operation in air-cooled V-twins.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003e16% silicon hypereutectic alloy construction\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eLow thermal expansion for tight clearances\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eOptimal ring seal and reduced wear\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eQuiet engine operation\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eDesigned for stock to mild builds on pump fuel\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese Kb Pistons Hypereutectic Cast Pistons are specifically designed for Shovelhead 88-89ci engines, featuring a .020 oversize. Built with a significant 16% silicon content, the hypereutectic alloy provides superior thermal barrier properties and a low expansion rate. This design characteristic allows for tight piston-to-cylinder wall clearance, which is critical for maintaining an optimal ring seal and promoting quieter, more wear-resistant operation in air-cooled engines. They are ideal for stock or mild compression ratios up to 10.5:1, running reliably on pump fuel.\u003c\/p\u003e\u003ch3\u003eAdvanced Design for Shovelhead Longevity\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e16% silicon hypereutectic alloy for high thermal stability\u003c\/li\u003e\n\u003cli\u003eLow thermal expansion rate enables tight piston-to-cylinder clearance\u003c\/li\u003e\n\u003cli\u003eOptimized ring seal for consistent power\u003c\/li\u003e\n\u003cli\u003eWear-resistant operation for extended engine life\u003c\/li\u003e\n\u003cli\u003eSuitable for stock to mild compression ratios on pump fuel\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eBuilding a Better Shovelhead Engine\u003c\/h3\u003e\u003cp\u003eWhen undertaking an engine rebuild or performance upgrade, the choice of pistons is paramount. These Kb Pistons require your Shovelhead 88-89ci cylinders to be bored and honed to the .020 oversize for a perfect fit. This precision ensures that you unlock the full benefits of the hypereutectic design, leading to a more efficient and durable engine. They are an excellent option for Harley Touring, Softail, or Dyna riders seeking dependable performance.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB294.020\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745064110\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine Displacement:\u003c\/strong\u003e Shovel 88–89ci\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePiston Size:\u003c\/strong\u003e .020 oversized\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 9.5 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 4.8 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 4.6 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.5 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat compression ratio are these pistons rated for?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThese hypereutectic pistons are rated for stock to mild compression ratios up to 10.5:1, designed for Shovelhead 88-89ci engines running on pump fuel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat does '.020 oversized' mean for installation?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThe '.020 oversized' means your cylinders will need to be bored and honed to this exact dimension to ensure proper piston-to-wall clearance and optimal performance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhy choose hypereutectic pistons for an air-cooled engine?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eHypereutectic pistons, with their high silicon content, offer superior thermal stability and low expansion, which is crucial for maintaining tight clearances and reducing noise in air-cooled V-twin engines.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Hypereutectic Cast Piston .020 - Harley Shovelhead 88-89ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-hypereutectic-cast-piston-pistons-shovel-88-89ci-5\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What compression ratio are these pistons rated for?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"These hypereutectic pistons are rated for stock to mild compression ratios up to 10.5:1, designed for Shovelhead 88-89ci engines running on pump fuel.\"}},{\"@type\":\"Question\",\"name\":\"What does '.020 oversized' mean for installation?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The '.020 oversized' means your cylinders will need to be bored and honed to this exact dimension to ensure proper piston-to-wall clearance and optimal performance.\"}},{\"@type\":\"Question\",\"name\":\"Why choose hypereutectic pistons for an air-cooled engine?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Hypereutectic pistons, with their high silicon content, offer superior thermal stability and low expansion, which is crucial for maintaining tight clearances and reducing noise in air-cooled V-twin engines.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035463049327,"sku":"824-01165","price":307.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_893f1373-5b89-4c12-af45-4ecad80121bb.png?v=1779561833"},{"product_id":"kb-pistons-cast-sportster-piston-pistons-xl-54ci-9-0-1-020-824-01202","title":"Kb Pistons Cast Sportster Piston 9.0:1 .020 - Harley Sportster 54ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eRevitalize your Harley Sportster 54ci engine with the Kb Pistons Cast Sportster Piston, engineered for a 9.0:1 compression ratio and a .020 oversized bore. This piston offers a direct replacement or a significant upgrade for your V-twin powerplant.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003eDurable cast piston construction\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eOptimized 9.0:1 compression ratio\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003e.020 inch oversized bore\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eDirect replacement or upgrade\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eIdeal for street and moderate performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese Kb Pistons Cast Sportster Pistons are designed specifically for 54ci V-twin engines, providing a 9.0:1 compression ratio and a .020 oversized bore. Crafted from durable cast construction, these pistons serve as an excellent component for both routine maintenance and performance rebuilds. They are built to withstand the demands of street riding and moderate performance builds, ensuring reliable operation and consistent power delivery for your Sportster.\u003c\/p\u003e\u003ch3\u003eReliable Power for Your Sportster\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eDurable cast piston construction\u003c\/li\u003e\n\u003cli\u003eOptimized 9.0:1 compression ratio\u003c\/li\u003e\n\u003cli\u003e.020 inch oversized bore for rebuilds\u003c\/li\u003e\n\u003cli\u003eDirect fitment for 54ci Sportster engines\u003c\/li\u003e\n\u003cli\u003eSuitable for street riding and moderate performance builds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe Foundation for a Strong Sportster Build\u003c\/h3\u003e\u003cp\u003eWhen installing these Kb Pistons, it's crucial to ensure your cylinders are bored and honed precisely to the .020 oversize specification for proper fit and optimal performance. This precision is key to achieving the desired compression and a long-lasting engine. These pistons are an ideal choice for Harley Sportster owners looking to rebuild their 54ci motor with dependable components that enhance overall ride quality and engine response.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB408C.020\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745151186\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 9.0:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBore Size:\u003c\/strong\u003e 0.020 in oversized\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine Displacement:\u003c\/strong\u003e 54 ci\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.5 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWill this piston fit my Harley Sportster?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThis piston is designed for 54ci Sportster engines. It is crucial to verify your engine displacement and cylinder block compatibility before ordering to ensure correct fitment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat does '.020 oversized' mean?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThe '.020 oversized' indicates that the piston bore is 0.020 inches larger than the stock size. Your cylinders must be bored and honed to this exact dimension for proper fitment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eIs this a cast or forged piston?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThis is a cast piston, which is suitable for street riding and moderate performance builds. Cast pistons offer good durability and are a cost-effective option for many Sportster owners.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Cast Sportster Piston 9.0:1 .020 - Harley Sportster 54ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-cast-sportster-piston-pistons-xl-54ci-9-0-2\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Will this piston fit my Harley Sportster?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This piston is designed for 54ci Sportster engines. It is crucial to verify your engine displacement and cylinder block compatibility before ordering to ensure correct fitment.\"}},{\"@type\":\"Question\",\"name\":\"What does '.020 oversized' mean?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The '.020 oversized' indicates that the piston bore is 0.020 inches larger than the stock size. Your cylinders must be bored and honed to this exact dimension for proper fitment.\"}},{\"@type\":\"Question\",\"name\":\"Is this a cast or forged piston?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This is a cast piston, which is suitable for street riding and moderate performance builds. Cast pistons offer good durability and are a cost-effective option for many Sportster owners.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035463082095,"sku":"824-01202","price":229.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_eca4fef1-1039-4921-86c8-54cc22a83999.png?v=1779565602"},{"product_id":"kb-pistons-cast-sportster-piston-pistons-xl-54ci-9-0-1-030-824-01203","title":"Kb Pistons Cast 9.0:1 .030 Oversized Piston - Harley Sportster 54ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eUnleash the full potential of your Harley Sportster 54ci engine with this high-quality cast piston from KB Pistons. Designed for rebuilds and performance upgrades, this piston delivers a 9.0:1 compression ratio for a noticeable boost in power.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003eBoosts compression to 9.0:1 for improved power\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eDurable cast construction for V-twin reliability\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eDesigned for 54ci Sportster engines\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eRequires .030 inch cylinder overbore\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis cast Sportster piston from KB Pistons is engineered for 54 cubic inch (XL) engines, providing a robust foundation for your V-twin's bottom end. With a 9.0:1 compression ratio and a .030 oversized bore, it's the ideal choice for riders looking to refresh their engine with enhanced performance and durability.\u003c\/p\u003e\u003ch3\u003eReliable Power for Your Sportster\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eDurable cast piston construction for long-lasting performance\u003c\/li\u003e\n\u003cli\u003eOptimized 9.0:1 compression ratio for street performance\u003c\/li\u003e\n\u003cli\u003eDesigned for 54 cubic inch (XL) Sportster engines\u003c\/li\u003e\n\u003cli\u003eRequires .030 inch oversized bore for proper fitment\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eRebuild with Confidence\u003c\/h3\u003e\u003cp\u003eWhether you're tackling a full engine rebuild or aiming for a performance bump, this KB Piston offers a precise fit and reliable operation. Ensure your cylinders are bored to the .030 oversized specification by a qualified machine shop before installation to achieve optimal piston-to-wall clearance and ring seal. This piston is a critical component in restoring or enhancing your Sportster's power delivery.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB408C.030\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745151209\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine Displacement:\u003c\/strong\u003e 54 cubic inch (XL)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 9.0:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBore Size:\u003c\/strong\u003e .030 oversized\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.5 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat engine size is this piston designed for?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThis piston is specifically for Harley-Davidson Sportster 54 cubic inch (XL) engines.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eDoes this piston require cylinder boring?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eYes, this is a .030 oversized piston, so your cylinders will need to be bored .030 over by a machine shop for correct fitment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat compression ratio will I get with this piston?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThis piston is designed to achieve a 9.0:1 compression ratio in a 54ci Sportster engine.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Cast 9.0:1 .030 Oversized Piston - Harley Sportster 54ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-cast-sportster-piston-pistons-xl-54ci-9-0-3\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What engine size is this piston designed for?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This piston is specifically for Harley-Davidson Sportster 54 cubic inch (XL) engines.\"}},{\"@type\":\"Question\",\"name\":\"Does this piston require cylinder boring?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, this is a .030 oversized piston, so your cylinders will need to be bored .030 over by a machine shop for correct fitment.\"}},{\"@type\":\"Question\",\"name\":\"What compression ratio will I get with this piston?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This piston is designed to achieve a 9.0:1 compression ratio in a 54ci Sportster engine.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035463114863,"sku":"824-01203","price":229.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_045af318-bac1-4a60-b558-57e7b62ce6ef.png?v=1779561989"},{"product_id":"kb-pistons-cast-sportster-piston-pistons-evo-xl-74ci-8-9-1-std-824-01205","title":"Kb Pistons Cast 8.9:1 Standard Bore Piston - Harley Sportster EVO XL 74ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eRestore your Harley Sportster EVO XL 74ci engine with a precision-engineered cast piston from KB Pistons. This standard bore piston maintains an 8.9:1 compression ratio, making it an excellent choice for direct replacement or mild performance upgrades.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003eMaintains 8.9:1 compression ratio\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eDurable cast construction for longevity\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eStandard bore for direct replacement\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eFits EVO XL 74ci Sportster engines\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis KB Pistons cast piston is specifically designed for EVO XL 74 cubic inch engines, offering a reliable solution for rebuilding your V-twin. With an 8.9:1 compression ratio and standard bore sizing, it provides a solid foundation for optimal engine performance without requiring cylinder modifications.\u003c\/p\u003e\u003ch3\u003eReliable Performance for EVO XL Engines\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eDurable cast construction ensures lasting engine reliability\u003c\/li\u003e\n\u003cli\u003eProvides an 8.9:1 compression ratio for balanced performance\u003c\/li\u003e\n\u003cli\u003eStandard bore sizing for direct replacement in unworn cylinders\u003c\/li\u003e\n\u003cli\u003eOptimized for EVO XL 74 cubic inch V-twin engines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eMaintain Factory Specifications\u003c\/h3\u003e\u003cp\u003eWhen it's time for a top-end refresh or a full engine overhaul, this standard bore piston from KB Pistons helps you maintain the factory specifications of your EVO XL 74ci engine. It's crucial to verify your cylinder bore size to ensure a perfect fit. This piston is an essential component for achieving consistent and dependable power delivery in your Harley Sportster.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB295.STD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745064172\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 8.9:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine:\u003c\/strong\u003e EVO XL 74ci\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 9.5 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 4.8 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 4.5 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.6 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat engine does this piston fit?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThis piston is designed for EVO XL 74 cubic inch V-twin engines.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eIs this a standard bore or oversized piston?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThis is a standard bore (STD) piston. Always confirm your engine's bore size before ordering to ensure correct fitment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eDo I need new piston rings with this?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003ePiston rings are typically sold separately from the piston. You will need to source the correct ring set for your application.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Cast 8.9:1 Standard Bore Piston - Harley Sportster EVO XL 74ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-cast-sportster-piston-pistons-evo-xl-74ci-8-9-1-std-824-01205\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What engine does this piston fit?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This piston is designed for EVO XL 74 cubic inch V-twin engines.\"}},{\"@type\":\"Question\",\"name\":\"Is this a standard bore or oversized piston?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This is a standard bore (STD) piston. Always confirm your engine's bore size before ordering to ensure correct fitment.\"}},{\"@type\":\"Question\",\"name\":\"Do I need new piston rings with this?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Piston rings are typically sold separately from the piston. You will need to source the correct ring set for your application.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035463934063,"sku":"824-01205","price":236.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_b27bfa23-77cc-445d-89fb-6bb9f899db4e.png?v=1779563104"},{"product_id":"kb-pistons-cast-sportster-piston-pistons-evo-xl-74ci-8-9-1-005-824-01206","title":"Kb Pistons Cast 8.9:1 .005 Oversized Piston - Harley Sportster EVO XL 74ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eRefresh your Harley Sportster Evolution XL 74ci engine with this cast piston from KB Pistons. Featuring an 8.9:1 compression ratio and a .005 oversized bore, it's perfect for high-mileage rebuilds or those seeking a slight displacement increase.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003e8.9:1 compression for EVO XL 74ci\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eDurable cast construction\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eFeatures .005 inch oversized bore\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eIdeal for high-mileage engine rebuilds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis KB Pistons cast piston is engineered for Evolution XL 74 cubic inch engines, offering a durable and precise component for your V-twin rebuild. With an 8.9:1 compression ratio and a .005 oversized bore, it's designed to bring new life to worn cylinders, ensuring tight tolerances and efficient power delivery.\u003c\/p\u003e\u003ch3\u003ePrecision for Evolution XL Rebuilds\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eDurable cast piston construction for long-term reliability\u003c\/li\u003e\n\u003cli\u003eAchieves an 8.9:1 compression ratio in 74ci EVO XL engines\u003c\/li\u003e\n\u003cli\u003eFeatures a .005 inch oversized bore to correct cylinder wear\u003c\/li\u003e\n\u003cli\u003eIdeal for refreshing high-mileage Harley Sportster engines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe Foundation of a Strong Engine\u003c\/h3\u003e\u003cp\u003eWhen undertaking an engine rebuild, selecting the correct piston is paramount. This .005 oversized piston requires your cylinders to be machined to match, ensuring optimal piston-to-cylinder wall clearance and maximizing engine efficiency. It's a critical step in restoring your Evolution XL Sportster to its peak performance, delivering consistent power and a smooth ride.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB295.005\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745064196\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 9.5 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 4.8 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 4.6 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.6 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat does the +.005 oversized bore mean?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThis piston is 0.005 inches larger than standard bore, meaning your cylinders must be bored to this size by a machine shop for proper fitment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat compression ratio does this piston provide?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThis piston delivers an 8.9:1 compression ratio when installed in a 74 cubic inch EVO XL engine.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWill this fit my Sportster?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThis piston fits Evolution XL Sportster engines with 74 cubic inch displacement that require a .005 oversized piston. Always confirm your specific engine requirements.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Cast 8.9:1 .005 Oversized Piston - Harley Sportster EVO XL 74ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-cast-sportster-piston-pistons-evo-xl-74ci-8-9-6\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What does the +.005 oversized bore mean?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This piston is 0.005 inches larger than standard bore, meaning your cylinders must be bored to this size by a machine shop for proper fitment.\"}},{\"@type\":\"Question\",\"name\":\"What compression ratio does this piston provide?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This piston delivers an 8.9:1 compression ratio when installed in a 74 cubic inch EVO XL engine.\"}},{\"@type\":\"Question\",\"name\":\"Will this fit my Sportster?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This piston fits Evolution XL Sportster engines with 74 cubic inch displacement that require a .005 oversized piston. Always confirm your specific engine requirements.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035463999599,"sku":"824-01206","price":236.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_899225f1-052e-4301-9f7b-0e898649d3f2.png?v=1779561844"},{"product_id":"kb-pistons-cast-sportster-piston-pistons-xl-883-to-1200-10-0-1-std-824-01256","title":"Kb Pistons Cast 10.0:1 Standard Bore Piston - Harley Sportster 883 to 1200 Conversion","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eTransform your Harley Sportster 883 into a potent 1200cc with this cast piston from KB Pistons. Engineered for 883-to-1200 conversions, this standard bore piston delivers a healthy 10.0:1 compression ratio for a significant performance boost.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003eConverts 883cc to 1200cc Sportster engines\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eDelivers strong 10.0:1 compression\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eDurable cast construction\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eStandard bore for direct fit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis KB Pistons cast piston is specifically designed for riders looking to upgrade their Harley-Davidson Sportster from an 883cc to a 1200cc engine. With a 10.0:1 compression ratio and standard bore sizing, it provides an excellent balance of performance and reliability for your displacement conversion. This piston is a direct replacement for stock Sportster pistons in standard bore applications.\u003c\/p\u003e\u003ch3\u003eUnleash 1200cc Power\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eDesigned for 883 to 1200cc Sportster engine conversions\u003c\/li\u003e\n\u003cli\u003eAchieves a performance-oriented 10.0:1 compression ratio\u003c\/li\u003e\n\u003cli\u003eDurable cast construction for long-term engine life\u003c\/li\u003e\n\u003cli\u003eStandard bore sizing for compatible cylinders\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe Heart of Your Big-Bore Conversion\u003c\/h3\u003e\u003cp\u003eConverting your 883 Sportster to 1200cc is one of the most impactful upgrades you can make for increased torque and horsepower. This KB Pistons standard bore piston is a crucial component of that conversion, ensuring you get optimal performance from your enlarged engine. Always confirm your cylinder bore is standard size for proper fitment with this piston. Pair it with other performance upgrades for a truly transformed riding experience.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB272.STD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745131607\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 10.0:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 9 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 4 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 4 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.61 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWill this piston work for an 883 to 1200 conversion?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eYes, this piston is specifically designed for Harley-Davidson Sportster 883 to 1200cc displacement conversions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat compression ratio does this piston provide?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThis piston is engineered to deliver a 10.0:1 compression ratio in a 1200cc Sportster engine.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eIs this a standard bore piston?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eYes, this part number is for standard bore applications. If your cylinders require an overbore, you will need a different KB Piston part number.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Cast 10.0:1 Standard Bore Piston - Harley Sportster 883 to 1200 Conversion\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-cast-sportster-piston-pistons-xl-883-to-1200-10-0-1-std-824-01256\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Will this piston work for an 883 to 1200 conversion?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, this piston is specifically designed for Harley-Davidson Sportster 883 to 1200cc displacement conversions.\"}},{\"@type\":\"Question\",\"name\":\"What compression ratio does this piston provide?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This piston is engineered to deliver a 10.0:1 compression ratio in a 1200cc Sportster engine.\"}},{\"@type\":\"Question\",\"name\":\"Is this a standard bore piston?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, this part number is for standard bore applications. If your cylinders require an overbore, you will need a different KB Piston part number.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035464032367,"sku":"824-01256","price":254.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_e6e85191-f8ad-4278-85d6-a20b6a9e7945.png?v=1779561844"},{"product_id":"kb-pistons-cast-sportster-piston-pistons-xl-883-to-1200-10-0-1-010-824-01258","title":"Kb Pistons Cast 10.0:1 .010 Oversized Piston - Harley Sportster 883 to 1200 Conversion","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eUpgrade your Harley Sportster 883 to 1200cc with this robust cast piston from KB Pistons. Designed for big-bore conversions, this .010 oversized piston delivers a powerful 10.0:1 compression ratio, perfect for riders seeking serious performance gains.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003eEnables 883cc to 1200cc Sportster conversion\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eAchieves 10.0:1 compression for power\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eDurable cast construction\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eRequires .010 inch cylinder overbore\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis KB Pistons cast piston is specifically engineered for Harley-Davidson Sportster 883 to 1200cc conversions, providing the foundation for a significant increase in engine displacement and power. With a 10.0:1 compression ratio and a .010 oversized diameter, it's designed to fit cylinders that have been machined to accommodate the larger bore, ensuring optimal performance and a tight seal.\u003c\/p\u003e\u003ch3\u003eMaximize Your 883-to-1200 Conversion\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eKey component for 883cc to 1200cc Sportster big-bore conversions\u003c\/li\u003e\n\u003cli\u003eDelivers a high-performance 10.0:1 compression ratio\u003c\/li\u003e\n\u003cli\u003eDurable cast construction for demanding V-twin applications\u003c\/li\u003e\n\u003cli\u003eFeatures a .010 inch oversized diameter for rebored cylinders\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe Core of a Performance Build\u003c\/h3\u003e\u003cp\u003eWhen converting your Sportster 883 to a 1200cc, choosing the right piston is crucial for both power and longevity. This KB Piston, with its .010 oversized bore, requires your cylinders to be machined accordingly, creating a perfect match for enhanced efficiency and reduced wear. This piston is built to handle the increased demands of a performance-tuned V-twin, making it an essential upgrade for any serious rider.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB272.010\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745131645\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 10.0:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOversized Diameter:\u003c\/strong\u003e .010 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 9.5 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 4.8 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 4.6 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.6 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWill this piston fit my 883 Sportster as-is?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eNo, this is a .010 oversized piston. Your cylinders must be bored .010 over by a machine shop to fit this piston. Stock 883 cylinders require a standard bore piston.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eCan I use this for an 883-to-1200 big-bore kit?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eYes, this piston is specifically sized for 883-to-1200 displacement upgrades where cylinders are bored .010 inches over stock.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat compression ratio does this piston provide?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThis piston delivers a 10.0:1 compression ratio, which generally requires careful fuel mapping during your dyno tune.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Cast 10.0:1 .010 Oversized Piston - Harley Sportster 883 to 1200 Conversion\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-cast-sportster-piston-pistons-xl-883-to-1200-10-0-8\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Will this piston fit my 883 Sportster as-is?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No, this is a .010 oversized piston. Your cylinders must be bored .010 over by a machine shop to fit this piston. Stock 883 cylinders require a standard bore piston.\"}},{\"@type\":\"Question\",\"name\":\"Can I use this for an 883-to-1200 big-bore kit?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, this piston is specifically sized for 883-to-1200 displacement upgrades where cylinders are bored .010 inches over stock.\"}},{\"@type\":\"Question\",\"name\":\"What compression ratio does this piston provide?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This piston delivers a 10.0:1 compression ratio, which generally requires careful fuel mapping during your dyno tune.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035464065135,"sku":"824-01258","price":254.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_988d749a-a4e6-46b2-ad32-4676c55583a4.png?v=1779561760"},{"product_id":"kb-pistons-hypereutectic-cast-piston-pistons-twin-cam-88ci-8-8-1-010-824-01352","title":"Kb Pistons Hypereutectic Cast 8.8:1 .010 Oversized Piston - Harley Twin Cam 88ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eEnhance the durability and performance of your Harley Twin Cam 88ci engine with this hypereutectic cast piston from KB Pistons. Featuring an 8.8:1 compression ratio and a .010 oversized bore, this piston is engineered for tight ring seal and low thermal expansion, ideal for air-cooled V-twins.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003e16% silicon hypereutectic alloy for durability\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eLow thermal expansion for consistent performance\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eTight clearances reduce noise and wear\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003e8.8:1 compression ratio for Twin Cam 88ci\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eRequires .010 inch cylinder overbore\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis KB Pistons hypereutectic cast piston is specifically designed for Twin Cam 88 cubic inch engines, offering a superior alternative for engine rebuilds and mild performance upgrades. Crafted from a 16% high-silicon alloy, these pistons are known for their tight piston-to-cylinder wall clearances and reduced thermal expansion, which translates to less engine noise and extended component life in your air-cooled Harley.\u003c\/p\u003e\u003ch3\u003eAdvanced Design for Twin Cam Reliability\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eConstructed from durable 16% silicon hypereutectic alloy\u003c\/li\u003e\n\u003cli\u003eExhibits low thermal expansion for consistent performance\u003c\/li\u003e\n\u003cli\u003ePromotes tight piston-to-cylinder wall clearances for efficiency\u003c\/li\u003e\n\u003cli\u003eReduces engine noise and wear, extending engine life\u003c\/li\u003e\n\u003cli\u003eSupports stock to mild compression ratios up to 10.5:1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe Smart Choice for Air-Cooled Engines\u003c\/h3\u003e\u003cp\u003eHypereutectic pistons are an excellent choice for air-cooled Harley engines running pump fuel, providing a balance of strength and thermal stability that is crucial for sustained performance. This .010 oversized piston is intended for cylinders that have been machined to match, ensuring a precise fit and optimal combustion. When rebuilding your Twin Cam 88ci, choosing these pistons means investing in long-term reliability and a smooth-running engine.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB425C.010\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745067715\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBore Size:\u003c\/strong\u003e .010 oversized\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 8.8:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine:\u003c\/strong\u003e Twin CAM 88ci\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.85 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat compression ratio do these pistons support?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThese hypereutectic pistons are designed for an 8.8:1 compression ratio in a Twin Cam 88ci engine and can support up to 10.5:1 with proper tuning and fuel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eAre these for .010 overbore or stock bore?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThese are .010 oversized pistons, meaning your cylinders must be bored .010 over by a machine shop for correct installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat are the benefits of a hypereutectic piston?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eHypereutectic pistons offer excellent durability, low thermal expansion, and tight clearances, which contribute to reduced engine noise and wear in air-cooled V-twin engines.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Hypereutectic Cast 8.8:1 .010 Oversized Piston - Harley Twin Cam 88ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-hypereutectic-cast-piston-pistons-twin-cam-88ci-8-8-2\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What compression ratio do these pistons support?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"These hypereutectic pistons are designed for an 8.8:1 compression ratio in a Twin Cam 88ci engine and can support up to 10.5:1 with proper tuning and fuel.\"}},{\"@type\":\"Question\",\"name\":\"Are these for .010 overbore or stock bore?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"These are .010 oversized pistons, meaning your cylinders must be bored .010 over by a machine shop for correct installation.\"}},{\"@type\":\"Question\",\"name\":\"What are the benefits of a hypereutectic piston?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Hypereutectic pistons offer excellent durability, low thermal expansion, and tight clearances, which contribute to reduced engine noise and wear in air-cooled V-twin engines.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035464130671,"sku":"824-01352","price":283.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_f618a473-4ef2-481e-b698-6039cf4a7eda.png?v=1779561994"},{"product_id":"kb-pistons-hypereutectic-cast-piston-pistons-twin-cam-88ci-8-8-1-020-824-01353","title":"Kb Pistons Hypereutectic Cast Piston 8.8:1 .020 - Harley Twin Cam 88ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eUnleash reliable performance from your Twin Cam 88ci with a Kb Pistons Hypereutectic Cast Piston. Engineered for air-cooled motors, this piston delivers a balanced 8.8:1 compression ratio and a .020 oversized bore for a refreshed top end. It's an ideal choice for riders looking to maintain a stock to mild tune while benefiting from enhanced piston integrity.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003e16% silicon hypereutectic alloy construction\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eResists thermal expansion for stable performance\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eMaintains tight piston-to-cylinder clearances\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eReduces engine wear and promotes quieter running\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eOptimized for stock to mild tunes on pump fuel\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis Kb Pistons hypereutectic cast piston is designed for Twin Cam 88ci engines, offering an 8.8:1 compression ratio and a .020 oversized bore. Crafted from a specialized 16% silicon alloy, it's built to resist thermal expansion, which is critical for the demanding conditions of air-cooled Harley-Davidson motors. This allows for tighter piston-to-cylinder clearances, promoting quieter operation and reduced wear over time, making it a solid foundation for your build.\u003c\/p\u003e\u003ch3\u003eEngineered for Lasting Performance\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eHypereutectic alloy with 16% silicon content for superior heat resistance\u003c\/li\u003e\n\u003cli\u003eLow thermal expansion rate maintains tight piston-to-cylinder clearances\u003c\/li\u003e\n\u003cli\u003eContributes to reduced engine wear and quieter operation\u003c\/li\u003e\n\u003cli\u003eOptimized for stock to mild tunes running on pump fuel\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eBuilding Your Top End\u003c\/h3\u003e\u003cp\u003eWhether you're refreshing an older engine or starting a new build, this piston provides a durable base. Its design is well-suited for stock or mild compression ratios, making it compatible with a range of cam profiles and exhaust systems without requiring extensive modifications. Always confirm bore measurements before installation to ensure proper fitment and performance.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB425C.020\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745067739\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBore Size:\u003c\/strong\u003e .020 oversized\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 8.8:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine Displacement:\u003c\/strong\u003e Twin CAM 88ci\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 9.5 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 4.8 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 4.6 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.5 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat compression ratio is this piston designed for?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThis Kb Pistons hypereutectic cast piston is engineered for an 8.8:1 compression ratio, suitable for stock to mild builds on pump fuel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eIs this piston a direct replacement for my Twin Cam 88ci?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThis piston is designed for Twin Cam 88ci engines with a .020 oversized bore. Always verify your current cylinder bore size before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWill I need to retune my motorcycle after installing these pistons?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eAny change to engine internals, including pistons, can affect air\/fuel mixture. A dyno tune is recommended to optimize performance and ensure engine longevity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Hypereutectic Cast Piston 8.8:1 .020 - Harley Twin Cam 88ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-hypereutectic-cast-piston-pistons-twin-cam-88ci-8-8-3\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What compression ratio is this piston designed for?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This Kb Pistons hypereutectic cast piston is engineered for an 8.8:1 compression ratio, suitable for stock to mild builds on pump fuel.\"}},{\"@type\":\"Question\",\"name\":\"Is this piston a direct replacement for my Twin Cam 88ci?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This piston is designed for Twin Cam 88ci engines with a .020 oversized bore. Always verify your current cylinder bore size before ordering.\"}},{\"@type\":\"Question\",\"name\":\"Will I need to retune my motorcycle after installing these pistons?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Any change to engine internals, including pistons, can affect air\/fuel mixture. A dyno tune is recommended to optimize performance and ensure engine longevity.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035464163439,"sku":"824-01353","price":283.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_9acf7f58-7137-4a74-b45b-71af599cfb92.png?v=1779561765"},{"product_id":"kb-pistons-hypereutectic-cast-piston-pistons-tc88-to-95ci-9-3-1-010-824-01363","title":"Kb Pistons Hypereutectic Cast Piston 9.3:1 .010 - Harley Twin Cam 88 to 95ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eUpgrade your Twin Cam 88 to 95 cubic inch engine with a Kb Pistons Hypereutectic Cast Piston. This piston is designed with a 9.3:1 compression ratio and a .010 oversized bore, making it an excellent choice for riders seeking a performance increase. Its advanced alloy composition ensures quiet operation and extended durability for air-cooled Harley engines.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003e16% silicon hypereutectic alloy\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eLow thermal expansion for tight clearances\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eQuiet engine operation and reduced wear\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eDesigned for 9.3:1 compression ratio\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003e.010 inch overbore for specific builds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe Kb Pistons Hypereutectic Cast Piston is engineered for Twin Cam 88 to 95 cubic inch engines, delivering a 9.3:1 compression ratio with a .010 oversized bore. Constructed from a specialized 16% silicon hypereutectic alloy, this piston is built to effectively resist thermal expansion. This critical feature allows for tighter piston-to-wall clearances, which translates to quieter engine running and significantly extended ring life in your air-cooled Harley-Davidson motor.\u003c\/p\u003e\u003ch3\u003eOptimized for Air-Cooled V-Twins\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eAdvanced 16% silicon hypereutectic alloy construction\u003c\/li\u003e\n\u003cli\u003eMinimizes thermal expansion for consistent performance\u003c\/li\u003e\n\u003cli\u003eEnsures tight piston-to-cylinder clearances\u003c\/li\u003e\n\u003cli\u003ePromotes quieter engine operation and reduced wear\u003c\/li\u003e\n\u003cli\u003eDesigned for 9.3:1 compression ratio with a .010 overbore\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReliable Power for Your Ride\u003c\/h3\u003e\u003cp\u003eThese pistons are an excellent foundation for builds ranging from stock replacements to mild performance upgrades. Their robust design supports the demands of daily riding while providing the reliability you expect. Consider pairing them with a performance cam and a dyno tune to fully realize the potential of your Twin Cam engine. Always confirm bore specifications to ensure a perfect fit.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB348.010\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745068439\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 9.3:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverbore:\u003c\/strong\u003e .010 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine Application:\u003c\/strong\u003e Twin Cam 88 to 95 cubic inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 9.5 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 4.8 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 4.6 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.5 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat engine displacement does this piston fit?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThis Kb Piston is designed for Twin Cam 88 to 95 cubic inch air-cooled engines, featuring a 9.3:1 compression ratio and a .010 overbore.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eIs this piston suitable for high-performance builds?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThese hypereutectic pistons are best suited for stock or mild compression ratios up to 10.5:1 running on pump fuel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eDo I need new rings with these pistons?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003ePistons are typically installed with new piston rings to ensure proper sealing and performance. Always follow manufacturer recommendations for ring selection and installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Hypereutectic Cast Piston 9.3:1 .010 - Harley Twin Cam 88 to 95ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-hypereutectic-cast-piston-pistons-tc88-to-95ci-9-3-3\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What engine displacement does this piston fit?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This Kb Piston is designed for Twin Cam 88 to 95 cubic inch air-cooled engines, featuring a 9.3:1 compression ratio and a .010 overbore.\"}},{\"@type\":\"Question\",\"name\":\"Is this piston suitable for high-performance builds?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"These hypereutectic pistons are best suited for stock or mild compression ratios up to 10.5:1 running on pump fuel.\"}},{\"@type\":\"Question\",\"name\":\"Do I need new rings with these pistons?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Pistons are typically installed with new piston rings to ensure proper sealing and performance. Always follow manufacturer recommendations for ring selection and installation.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035464982639,"sku":"824-01363","price":307.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_ad028253-e37b-4a73-b07e-31038a97fec5.png?v=1779562006"},{"product_id":"kb-pistons-hypereutectic-cast-piston-pistons-tc88-to-95ci-9-3-1-std-824-01361","title":"Kb Pistons Hypereutectic Cast Piston 9.3:1 Standard Bore - Harley Twin Cam 88 to 95ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eEnhance the performance of your Twin Cam 88 to 95ci air-cooled engine with Kb Pistons Hypereutectic Cast Pistons. These pistons are engineered for a 9.3:1 compression ratio and a standard bore, providing a solid foundation for your motor. Their advanced construction ensures quiet operation and reduced wear, making them ideal for stock or mild builds.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003e16% silicon hypereutectic alloy\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eLow thermal expansion rate\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eTight piston-to-cylinder clearances\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eSuitable for stock to mild compression\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eOptimized for air-cooled engines\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese Kb Pistons Hypereutectic Cast Pistons are specifically designed for Twin Cam 88 to 95 cubic inch air-cooled engines at a standard bore. Featuring a 9.3:1 compression ratio, they are cast with a 16% silicon content, which is crucial for achieving low thermal expansion. This characteristic allows for tighter piston-to-wall clearances, directly contributing to quieter engine operation and significantly reduced wear over the lifespan of your V-twin. They are perfectly suited for builds maintaining stock to mild compression ratios up to 10.5:1.\u003c\/p\u003e\u003ch3\u003eKey Advantages for Your V-Twin\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eConstructed from a 16% silicon hypereutectic alloy\u003c\/li\u003e\n\u003cli\u003eExhibits low thermal expansion for optimal fitment\u003c\/li\u003e\n\u003cli\u003eMaintains tight piston-to-cylinder clearances\u003c\/li\u003e\n\u003cli\u003eDelivers quieter engine operation and reduced component wear\u003c\/li\u003e\n\u003cli\u003eOptimized for air-cooled Harley-Davidson engines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eBuilding a Reliable Powerplant\u003c\/h3\u003e\u003cp\u003eThese pistons provide a robust and reliable option for those looking to refresh their Twin Cam engine or embark on a mild performance build. Their standard bore design simplifies installation for engines that haven't been previously bored out. For optimal results, consider pairing these pistons with a compatible cam and ensuring your engine is properly tuned to maximize efficiency and power output.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB348.STD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745068392\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine Family:\u003c\/strong\u003e Twin Cam 88 to 95ci\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBore:\u003c\/strong\u003e Standard\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 9.3:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 9.6 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 4.8 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 4.6 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 3 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat compression ratio are these pistons rated for?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThese hypereutectic pistons are best suited for stock or mild compression ratios up to 10.5:1 running on pump fuel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWill these work in my big-bore 98ci or 103ci engine?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eNo, these pistons are sized for Twin Cam 88 to 95ci displacement at standard bore and are not compatible with larger displacements.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eDo I need to bore my cylinders for these pistons?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThese pistons are designed for standard bore Twin Cam 88 to 95ci engines, meaning boring may not be necessary if your cylinders are within spec.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Hypereutectic Cast Piston 9.3:1 Standard Bore - Harley Twin Cam 88 to 95ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-hypereutectic-cast-piston-pistons-tc88-to-95ci-9-3-1-std-824-01361\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What compression ratio are these pistons rated for?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"These hypereutectic pistons are best suited for stock or mild compression ratios up to 10.5:1 running on pump fuel.\"}},{\"@type\":\"Question\",\"name\":\"Will these work in my big-bore 98ci or 103ci engine?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No, these pistons are sized for Twin Cam 88 to 95ci displacement at standard bore and are not compatible with larger displacements.\"}},{\"@type\":\"Question\",\"name\":\"Do I need to bore my cylinders for these pistons?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"These pistons are designed for standard bore Twin Cam 88 to 95ci engines, meaning boring may not be necessary if your cylinders are within spec.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035464949871,"sku":"824-01361","price":307.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_b20a5f9c-c7b0-4e54-ab4a-abbf337b2465.png?v=1779561847"},{"product_id":"kb-pistons-hypereutectic-cast-piston-pistons-tc88-to-95ci-9-3-1-020-824-01364","title":"Kb Pistons Hypereutectic Cast Piston 9.3:1 .020 - Harley Twin Cam 88 to 95ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eUpgrade your Twin Cam 88 to 95ci air-cooled Harley engine with a Kb Pistons Hypereutectic Cast Piston. This piston is designed for a 9.3:1 compression ratio and a .020 oversized bore, providing a robust solution for your build. Its advanced alloy construction minimizes thermal expansion for improved durability and quieter operation.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003e16% silicon hypereutectic alloy construction\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eLow thermal expansion rate\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eTight piston-to-cylinder-wall clearances\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eOptimal ring seal and reduced blow-by\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eSuitable for stock to mild compression ratios\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe Kb Pistons Hypereutectic Cast Piston is engineered for Twin Cam 88 to 95 cubic inch air-cooled Harley-Davidson engines, offering a 9.3:1 compression ratio and a .020 oversized bore. This piston is cast from a high-quality 16% silicon hypereutectic alloy, which is key to its performance. The alloy's properties ensure low thermal expansion and tight piston-to-wall clearances, leading to optimal ring seal and reduced blow-by. This translates to quieter engine operation and significantly reduced cylinder wear, making it a reliable choice for your V-twin.\u003c\/p\u003e\u003ch3\u003eCore Benefits for Your Engine\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eConstructed from 16% silicon hypereutectic alloy\u003c\/li\u003e\n\u003cli\u003eFeatures a low thermal expansion rate for consistent performance\u003c\/li\u003e\n\u003cli\u003eEnsures tight piston-to-cylinder-wall clearances\u003c\/li\u003e\n\u003cli\u003ePromotes optimal ring seal and reduced blow-by\u003c\/li\u003e\n\u003cli\u003eSuitable for stock to mild compression ratios on pump fuel\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eBuilding a Stronger Twin Cam\u003c\/h3\u003e\u003cp\u003eThese pistons provide a durable and efficient upgrade for riders looking to rebuild or enhance their Twin Cam engine. The .020 overbore offers a fresh surface for new rings and cylinders, ensuring a tight seal and consistent power delivery. For the best performance, consider a comprehensive engine build that includes a performance camshaft and a professional dyno tune to dial in your air\/fuel mixture.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB348.020\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745068453\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 9.3:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine Displacement:\u003c\/strong\u003e Twin Cam 88 to 95ci\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 9.5 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 4.8 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 4.6 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.5 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat compression ratio is this piston rated for?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThis piston is designed for a 9.3:1 compression ratio, suitable for stock to mild builds up to 10.5:1 on pump fuel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhy choose hypereutectic pistons over forged?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eHypereutectic pistons offer excellent thermal stability and tight clearances for quieter operation and reduced wear, making them ideal for street applications and mild performance builds on pump fuel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWill this fit my specific Twin Cam model?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThis piston is designed for Twin Cam 88 to 95 cubic inch Harley-Davidson engines with a .020 overbore. Please confirm your engine's displacement and current bore size before purchasing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Hypereutectic Cast Piston 9.3:1 .020 - Harley Twin Cam 88 to 95ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-hypereutectic-cast-piston-pistons-tc88-to-95ci-9-3-4\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What compression ratio is this piston rated for?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This piston is designed for a 9.3:1 compression ratio, suitable for stock to mild builds up to 10.5:1 on pump fuel.\"}},{\"@type\":\"Question\",\"name\":\"Why choose hypereutectic pistons over forged?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Hypereutectic pistons offer excellent thermal stability and tight clearances for quieter operation and reduced wear, making them ideal for street applications and mild performance builds on pump fuel.\"}},{\"@type\":\"Question\",\"name\":\"Will this fit my specific Twin Cam model?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This piston is designed for Twin Cam 88 to 95 cubic inch Harley-Davidson engines with a .020 overbore. Please confirm your engine's displacement and current bore size before purchasing.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035465048175,"sku":"824-01364","price":307.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_3b51e76e-f884-4e24-b897-25d205409018.png?v=1779561763"},{"product_id":"kb-pistons-hypereutectic-cast-piston-pistons-tc88-to-95ci-10-5-1-std-824-01367","title":"Kb Pistons Hypereutectic Cast Piston 10.5:1 Standard Bore - Harley Twin Cam 88 to 95ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eAchieve a significant performance boost in your Twin Cam 88 engine bored to 95 cubic inches with Kb Pistons Hypereutectic Cast Pistons. These pistons feature a 10.5:1 compression ratio and a standard bore, providing increased power potential. Their advanced alloy construction ensures excellent thermal stability and reduced wear for your air-cooled V-twin.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003e16% silicon hypereutectic alloy\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eLow thermal expansion rate\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eTight piston-to-cylinder clearances\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eOptimized for 10.5:1 compression ratio\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eStandard bore size\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese Kb Pistons Hypereutectic Cast Pistons are engineered to transform your Twin Cam 88 (TC88) engine when bored to 95 cubic inches. Featuring a robust 10.5:1 compression ratio and a standard bore, they are cast with a substantial 16% silicon content. This specific alloy minimizes thermal expansion, allowing for tighter piston-to-cylinder clearances that are essential for air-cooled applications. The result is improved ring seal, quieter engine operation, and significantly reduced wear, making these pistons ideal for stock or mild compression builds running on pump fuel.\u003c\/p\u003e\u003ch3\u003ePerformance-Enhancing Design\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e16% silicon hypereutectic alloy for superior thermal properties\u003c\/li\u003e\n\u003cli\u003eLow thermal expansion maintains tight piston clearances\u003c\/li\u003e\n\u003cli\u003eOptimized for an aggressive 10.5:1 compression ratio\u003c\/li\u003e\n\u003cli\u003eContributes to improved ring seal and quieter running\u003c\/li\u003e\n\u003cli\u003eStandard bore size for straightforward installation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOptimizing Your Engine's Potential\u003c\/h3\u003e\u003cp\u003eWith these pistons, you're setting the stage for a noticeable increase in power and responsiveness from your Twin Cam. The 10.5:1 compression ratio is a sweet spot for street performance, offering a strong pull without demanding exotic fuels. To fully leverage this upgrade, consider a performance camshaft designed for higher compression and a professional dyno tune to ensure optimal air\/fuel delivery and ignition timing.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB411.STD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745152244\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine:\u003c\/strong\u003e Twin Cam 88 (TC88) \/ 95 cubic inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 10.5:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 9.5 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 4.8 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 4.6 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 3.1 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat fuel should I run with these pistons?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThese hypereutectic pistons are designed for pump fuel on engines up to 10.5:1 compression. Higher ratios or boost may require premium or race fuel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWill these pistons fit my stock Twin Cam 88 engine?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThese pistons are designed for Twin Cam 88 engines that have been bored to 95 cubic inches. They will not fit an untouched 88ci cylinder.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eDo I need to tune my bike after installing these pistons?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eYes, installing pistons with a higher compression ratio requires a proper dyno tune to optimize fuel delivery and ignition timing, ensuring peak performance and engine longevity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Hypereutectic Cast Piston 10.5:1 Standard Bore - Harley Twin Cam 88 to 95ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-hypereutectic-cast-piston-pistons-tc88-to-95ci-10-5-1-std-824-01367\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What fuel should I run with these pistons?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"These hypereutectic pistons are designed for pump fuel on engines up to 10.5:1 compression. Higher ratios or boost may require premium or race fuel.\"}},{\"@type\":\"Question\",\"name\":\"Will these pistons fit my stock Twin Cam 88 engine?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"These pistons are designed for Twin Cam 88 engines that have been bored to 95 cubic inches. They will not fit an untouched 88ci cylinder.\"}},{\"@type\":\"Question\",\"name\":\"Do I need to tune my bike after installing these pistons?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, installing pistons with a higher compression ratio requires a proper dyno tune to optimize fuel delivery and ignition timing, ensuring peak performance and engine longevity.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035465080943,"sku":"824-01367","price":319.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_20049905-e722-49d2-b1fc-772f2204a98e.png?v=1779561847"},{"product_id":"kb-pistons-hypereutectic-cast-piston-pistons-tc88-to-95ci-10-5-1-010-824-01369","title":"Kb Pistons Hypereutectic Cast Piston 10.5:1 .010 - Harley Twin Cam 88 to 95ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eMaximize the performance of your Twin Cam 88 engine bored to 95 cubic inches with a Kb Pistons Hypereutectic Cast Piston. This piston features an aggressive 10.5:1 compression ratio and a .010 oversized bore, delivering a noticeable power increase. Its specialized alloy construction ensures superior thermal stability and reduced wear for your air-cooled Harley.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003e16% silicon hypereutectic alloy construction\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eLow thermal expansion for tight ring seal\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eOptimized for 10.5:1 compression ratio\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eSuitable for pump fuel (non-boosted)\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eDesigned for air-cooled engines\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe Kb Pistons Hypereutectic Cast Piston is specifically engineered for Twin Cam 88 (TC88) engines that have been bored to 95 cubic inches, delivering a potent 10.5:1 compression ratio. This piston features a .010 oversized bore, providing a fresh surface for cylinder refurbishment. It's cast from a 16% silicon hypereutectic alloy, known for its superior thermal barrier properties and low expansion rate. This design ensures tight piston-to-cylinder clearances, which translates to quieter engine operation and significantly reduced wear, making it an excellent choice for performance-oriented street builds running on pump fuel.\u003c\/p\u003e\u003ch3\u003eEngineered for Enhanced Power\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eConstructed from 16% silicon hypereutectic alloy\u003c\/li\u003e\n\u003cli\u003eLow thermal expansion ensures tight ring seal\u003c\/li\u003e\n\u003cli\u003eOptimized for an impressive 10.5:1 compression ratio\u003c\/li\u003e\n\u003cli\u003eSuitable for use with pump fuel in non-boosted applications\u003c\/li\u003e\n\u003cli\u003eDesigned for air-cooled Harley-Davidson V-twin engines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eAchieving Peak Performance\u003c\/h3\u003e\u003cp\u003eInstalling these pistons is a significant step towards unlocking more power from your Twin Cam 88-to-95ci engine. The increased compression ratio will provide a crisper throttle response and stronger acceleration. To fully capitalize on this upgrade, it's highly recommended to pair these pistons with a performance cam and a professional dyno tune. This will ensure your engine's fuel map and timing are perfectly calibrated for the new compression, maximizing power and maintaining reliability.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB411.010\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745152282\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 10.5:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine Size:\u003c\/strong\u003e 95 cubic inches (Twin Cam 88)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 9.6 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 4.9 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 4.6 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 3.1 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat compression ratio is this piston designed for?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThis piston is designed for a 10.5:1 compression ratio and is best suited for stock or mild builds running on pump fuel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhy choose hypereutectic instead of forged?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eHypereutectic pistons offer excellent thermal stability, tight clearances for quieter operation, and reduced wear, making them ideal for street applications and mild performance builds on pump fuel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWill this piston fit my Twin Cam 88 engine without boring?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eNo, this piston is designed for Twin Cam 88 engines that have been bored to 95 cubic inches with a .010 oversized bore. You will need to bore your cylinders to match.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Hypereutectic Cast Piston 10.5:1 .010 - Harley Twin Cam 88 to 95ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-hypereutectic-cast-piston-pistons-tc88-to-95ci-10-5-9\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What compression ratio is this piston designed for?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This piston is designed for a 10.5:1 compression ratio and is best suited for stock or mild builds running on pump fuel.\"}},{\"@type\":\"Question\",\"name\":\"Why choose hypereutectic instead of forged?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Hypereutectic pistons offer excellent thermal stability, tight clearances for quieter operation, and reduced wear, making them ideal for street applications and mild performance builds on pump fuel.\"}},{\"@type\":\"Question\",\"name\":\"Will this piston fit my Twin Cam 88 engine without boring?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No, this piston is designed for Twin Cam 88 engines that have been bored to 95 cubic inches with a .010 oversized bore. You will need to bore your cylinders to match.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035465113711,"sku":"824-01369","price":319.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_a7bd3155-7596-46f7-89a0-6f2c040329be.png?v=1779561849"},{"product_id":"kb-pistons-hypereutectic-cast-piston-pistons-tc88-to-95ci-10-5-1-005-824-01368","title":"Kb Pistons Hypereutectic Cast Piston 10.5:1 .005 - Harley Twin Cam 88 to 95ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eUnleash the full potential of your Twin Cam 88 to 95ci engine with a set of KB Pistons Hypereutectic Cast Pistons. Engineered for optimal performance in air-cooled Harley engines, these pistons offer a 10.5:1 compression ratio.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003e16% silicon hypereutectic alloy for durability\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eLow thermal expansion ensures tight ring seal\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eReduces engine noise and wear\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eOptimized for air-cooled Twin Cam engines\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eIdeal for stock or mild compression ratios\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese hypereutectic cast pistons are built from a 16% silicon alloy, ensuring tight piston-to-cylinder clearances and reduced wear. This advanced construction contributes to quieter operation, making them an excellent choice for riders seeking a smooth and reliable engine upgrade.\u003c\/p\u003e\u003ch3\u003eOptimized for Air-Cooled Performance\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eConstructed from durable 16% silicon hypereutectic alloy\u003c\/li\u003e\n\u003cli\u003eDesigned for low thermal expansion, promoting a tight ring seal\u003c\/li\u003e\n\u003cli\u003eReduces engine noise and wear for a smoother ride\u003c\/li\u003e\n\u003cli\u003eIdeal for stock or mild boost applications on pump fuel\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eEngineered for Durability and Reliability\u003c\/h3\u003e\u003cp\u003eKB Pistons are a trusted choice for Twin Cam engine builders looking for durability without compromising performance. These pistons are specifically designed to perform under the unique demands of air-cooled Harley-Davidson powerplants, providing a solid foundation for your next build. They are a smart choice for maintaining reliability while enhancing your bike's power delivery.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB411.005\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745152268\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine Application:\u003c\/strong\u003e Twin Cam 88 to 95ci\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 10.5:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 9.5 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 4.8 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 4.6 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 3.1 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat compression ratio are these pistons designed for?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThese pistons are engineered for a 10.5:1 compression ratio and are suitable for stock or mild performance builds.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eAre these pistons suitable for boosted applications?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThey are designed for stock or mild boost applications on pump fuel. For extreme boost or nitrous, forged pistons might be a better choice.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eDo these pistons require any special installation considerations?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThese are precision-machined components. We recommend professional installation to ensure proper clearances and optimal engine performance. Confirm exact fitment for your year and model using our Shop by Bike tool.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Hypereutectic Cast Piston 10.5:1 .005 - Harley Twin Cam 88 to 95ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-hypereutectic-cast-piston-pistons-tc88-to-95ci-10-5-8\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What compression ratio are these pistons designed for?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"These pistons are engineered for a 10.5:1 compression ratio and are suitable for stock or mild performance builds.\"}},{\"@type\":\"Question\",\"name\":\"Are these pistons suitable for boosted applications?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"They are designed for stock or mild boost applications on pump fuel. For extreme boost or nitrous, forged pistons might be a better choice.\"}},{\"@type\":\"Question\",\"name\":\"Do these pistons require any special installation considerations?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"These are precision-machined components. We recommend professional installation to ensure proper clearances and optimal engine performance. Confirm exact fitment for your year and model using our Shop by Bike tool.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035465146479,"sku":"824-01368","price":319.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_0a1e6936-93c3-4dac-98c5-af6f6e0bd6f8.png?v=1779565613"},{"product_id":"kb-pistons-hypereutectic-cast-piston-pistons-tc88-to-95ci-10-5-1-020-824-01370","title":"Kb Pistons Hypereutectic Cast Piston 10.5:1 .020 - Harley Twin Cam 88 to 95ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eEnhance the performance of your Twin Cam 88 or 95ci engine with KB Pistons Hypereutectic Cast Pistons. These pistons are specifically engineered for air-cooled Harley applications, featuring a 10.5:1 compression ratio.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003e16% silicon hypereutectic alloy construction\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eLow thermal expansion for tight clearances\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eOptimal ring seal and reduced engine noise\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eSuitable for stock to mild 10.5:1 compression\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eDesigned for air-cooled Twin Cam engines\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCrafted from a 16% silicon hypereutectic alloy, these pistons boast high thermal barrier properties and low expansion rates. This design allows for tighter piston-to-cylinder clearances, which translates to reduced engine wear and quieter operation in your V-twin.\u003c\/p\u003e\u003ch3\u003ePrecision Engineering for Your V-Twin\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e16% silicon hypereutectic alloy for superior thermal stability\u003c\/li\u003e\n\u003cli\u003eLow thermal expansion ensures precise piston-to-cylinder fit\u003c\/li\u003e\n\u003cli\u003eOptimized ring seal for improved engine efficiency\u003c\/li\u003e\n\u003cli\u003eReduces unwanted engine noise and wear over time\u003c\/li\u003e\n\u003cli\u003eCompatible with stock or mild compression ratios up to 10.5:1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReliable Performance for Street and Mild Builds\u003c\/h3\u003e\u003cp\u003eThese KB Pistons are ideal for riders looking to rebuild or upgrade their Twin Cam 88 or 95ci engine with a focus on reliability and smooth operation. Designed to run on pump fuel, they provide a strong foundation for street-focused bikes or mild performance builds. Always confirm the correct bore size for your specific engine before ordering.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB411.020\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745152305\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine:\u003c\/strong\u003e Twin-Cam 88 and 95ci\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 10.5:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePiston Size:\u003c\/strong\u003e .020 over\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.5 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat compression ratio are these pistons designed for?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThese hypereutectic pistons are rated for stock to mild compression ratios up to 10.5:1 on pump fuel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat is the benefit of hypereutectic alloy in these pistons?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThe 16% silicon hypereutectic alloy provides high thermal barrier properties and low expansion, allowing for tighter piston-to-cylinder clearances, reduced wear, and quieter operation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eDo I need to re-bore my cylinders for these pistons?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThese pistons are .020 oversized. You will need to confirm your cylinder bore requirements to ensure a proper fit. Consult your engine builder.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Hypereutectic Cast Piston 10.5:1 .020 - Harley Twin Cam 88 to 95ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-hypereutectic-cast-piston-pistons-tc88-to-95ci-10-5-0\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What compression ratio are these pistons designed for?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"These hypereutectic pistons are rated for stock to mild compression ratios up to 10.5:1 on pump fuel.\"}},{\"@type\":\"Question\",\"name\":\"What is the benefit of hypereutectic alloy in these pistons?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The 16% silicon hypereutectic alloy provides high thermal barrier properties and low expansion, allowing for tighter piston-to-cylinder clearances, reduced wear, and quieter operation.\"}},{\"@type\":\"Question\",\"name\":\"Do I need to re-bore my cylinders for these pistons?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"These pistons are .020 oversized. You will need to confirm your cylinder bore requirements to ensure a proper fit. Consult your engine builder.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035465212015,"sku":"824-01370","price":319.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_7c7cf05a-f90e-42c1-8f91-9eebb4669627.png?v=1779561855"},{"product_id":"kb-pistons-hypereutectic-cast-piston-pistons-tc96-to-103ci-10-0-1-std-824-01373","title":"Kb Pistons Hypereutectic Cast Piston 10.0:1 STD - Harley Twin Cam 96 to 103ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eMaximize the efficiency of your Twin Cam 96 to 103ci engine with KB Pistons Hypereutectic Cast Pistons. Designed for optimal performance in air-cooled Harley motors, these pistons deliver a 10.0:1 compression ratio.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003e16% silicon hypereutectic alloy construction\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eLow thermal expansion for tight clearances\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eOptimal ring seal and quiet operation\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eDesigned for stock and mild compression ratios\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eStandard bore size for direct fit applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese cast pistons are formulated with a 16% silicon content, providing exceptional thermal barrier properties and low expansion rates. This advanced material science allows for incredibly tight piston-to-cylinder clearances, which is crucial for the longevity and quiet operation of air-cooled V-twin engines running on pump fuel.\u003c\/p\u003e\u003ch3\u003eEngineered for Air-Cooled Reliability\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e16% silicon hypereutectic alloy for high thermal stability\u003c\/li\u003e\n\u003cli\u003eLow thermal expansion ensures a precise fit and seal\u003c\/li\u003e\n\u003cli\u003ePromotes optimal ring seal for consistent power delivery\u003c\/li\u003e\n\u003cli\u003eContributes to quieter engine operation and reduced wear\u003c\/li\u003e\n\u003cli\u003eDesigned for stock and mild compression ratios up to 10.5:1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSolid Foundation for Your Twin Cam Build\u003c\/h3\u003e\u003cp\u003eWhether you're refreshing a tired motor or embarking on a mild performance build, these KB Pistons provide a robust and reliable foundation. Their standard bore size makes them a direct fit for many applications, simplifying the upgrade process. These pistons are built to withstand the demands of the open road, ensuring your Twin Cam runs strong for miles to come.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB409C.STD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745151445\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine:\u003c\/strong\u003e Twin Cam 96-103 ci\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 10.0:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBore Size:\u003c\/strong\u003e STD (standard)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 5.9 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 5.8 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 5.6 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.55 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWill these pistons work in my stock Twin Cam engine?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eYes, hypereutectic pistons are ideal for stock compression ratios and mild builds running 10.0:1 to 10.5:1 on pump fuel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat is the primary advantage of these hypereutectic pistons?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThe main advantage is their 16% silicon content, which provides low thermal expansion for tight piston-to-cylinder clearances, reducing engine noise and wear in air-cooled applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eAre these pistons designed for high-performance forced induction applications?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThese pistons are best suited for stock to mild compression ratios on pump fuel. For high-boost or nitrous applications, forged pistons are typically recommended.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Hypereutectic Cast Piston 10.0:1 STD - Harley Twin Cam 96 to 103ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-hypereutectic-cast-piston-pistons-tc96-to-103ci-10-0-1-std-824-01373\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Will these pistons work in my stock Twin Cam engine?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, hypereutectic pistons are ideal for stock compression ratios and mild builds running 10.0:1 to 10.5:1 on pump fuel.\"}},{\"@type\":\"Question\",\"name\":\"What is the primary advantage of these hypereutectic pistons?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The main advantage is their 16% silicon content, which provides low thermal expansion for tight piston-to-cylinder clearances, reducing engine noise and wear in air-cooled applications.\"}},{\"@type\":\"Question\",\"name\":\"Are these pistons designed for high-performance forced induction applications?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"These pistons are best suited for stock to mild compression ratios on pump fuel. For high-boost or nitrous applications, forged pistons are typically recommended.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035465998447,"sku":"824-01373","price":244.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_a1afea32-6b1a-4b0e-84e2-724f51531ba6.png?v=1779562007"},{"product_id":"kb-pistons-forged-alloy-piston-pistons-tc88-to-95ci-9-25-1-010-824-01502","title":"Kb Pistons Forged Alloy Piston 9.25:1 .010 - Harley Twin Cam 88 to 95ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eTake your Twin Cam 88 to 95ci engine to the next level with KB Pistons Forged Alloy Pistons. Engineered for demanding street or race applications, these pistons offer a 9.25:1 compression ratio and a .010 oversized bore.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003e4032 forged alloy with 11% silicon\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eSuperior crack resistance under detonation\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eCoated skirts for enhanced durability\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eIdeal for power adders like NOS or boost\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eIncludes rings, wrist pins, and locks\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCrafted from a robust 4032 forged alloy with an 11% silicon content, these pistons provide superior crack resistance, even under conditions of detonation or pre-ignition. This makes them an excellent choice for riders pushing the limits with power adders like nitrous or boost, ensuring reliability when it matters most.\u003c\/p\u003e\u003ch3\u003eBuilt for Extreme Performance\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eConstructed from 4032 forged alloy with 11% silicon\u003c\/li\u003e\n\u003cli\u003eExceptional crack resistance against detonation and pre-ignition\u003c\/li\u003e\n\u003cli\u003eCoated skirts for reduced friction and increased longevity\u003c\/li\u003e\n\u003cli\u003eDesigned for high-stress street and race applications\u003c\/li\u003e\n\u003cli\u003eIncludes rings, wrist pins, and locks for a complete installation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReady for Power Adders and High Demands\u003c\/h3\u003e\u003cp\u003eThese KB Forged Alloy Pistons are not just about raw strength; they're about delivering consistent performance under the most challenging conditions. The included rings, wrist pins, and locks ensure a comprehensive upgrade, setting your Twin Cam up for success whether you're hitting the drag strip or carving canyons with added power. Confirm proper bore and compression requirements for your specific build.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB904C.010\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745152404\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 9.25:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBore Size:\u003c\/strong\u003e .010 oversized\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine Displacement:\u003c\/strong\u003e Twin Cam 88 to 95ci\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 5.9 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 5.8 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 5.7 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.5 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat comes included with the pistons?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eEach pair of pistons comes complete with rings, wrist pins, and wrist pin locks for a comprehensive installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eAre these pistons suitable for engines with power adders?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eYes, these forged alloy pistons are specifically designed for street or race applications utilizing power adders such as nitrous or boost, offering superior crack resistance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eDo these pistons require any special machining?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThese pistons are .010 oversized. You will need to ensure your cylinders are bored and honed to the correct specification for a precise fit. Professional installation is highly recommended.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Forged Alloy Piston 9.25:1 .010 - Harley Twin Cam 88 to 95ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-forged-alloy-piston-pistons-tc88-to-95ci-9-25-2\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What comes included with the pistons?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Each pair of pistons comes complete with rings, wrist pins, and wrist pin locks for a comprehensive installation.\"}},{\"@type\":\"Question\",\"name\":\"Are these pistons suitable for engines with power adders?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, these forged alloy pistons are specifically designed for street or race applications utilizing power adders such as nitrous or boost, offering superior crack resistance.\"}},{\"@type\":\"Question\",\"name\":\"Do these pistons require any special machining?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"These pistons are .010 oversized. You will need to ensure your cylinders are bored and honed to the correct specification for a precise fit. Professional installation is highly recommended.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035466063983,"sku":"824-01502","price":337.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_fe24492d-aafc-40b9-84ab-211308cedcc4.png?v=1779561853"},{"product_id":"kb-pistons-forged-alloy-piston-pistons-tc88-to-95ci-9-25-1-std-824-01500","title":"Kb Pistons Forged Alloy Piston 9.25:1 STD - Harley Twin Cam 88 to 95ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eFortify your Twin Cam 88 to 95ci engine with KB Pistons Forged Alloy Pistons, featuring a 9.25:1 compression ratio and standard bore. These pistons are engineered for peak performance and extreme durability.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003e4032 forged alloy with 11% silicon\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eSuperior crack resistance under stress\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eCoated skirts for long-lasting performance\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eIncludes rings, wrist pins, and locks\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eIdeal for power adders and race applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eManufactured from a high-strength 4032 forged alloy with an 11% silicon content, these pistons offer superior crack resistance against detonation and pre-ignition. This makes them an ideal choice for riders pushing their V-twin with power adders like nitrous or boost, ensuring your engine can handle the increased demands of street or race applications.\u003c\/p\u003e\u003ch3\u003eUnmatched Strength and Reliability\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eConstructed from durable 4032 forged alloy with 11% silicon\u003c\/li\u003e\n\u003cli\u003eFormed in a forging press and fully machined for precision\u003c\/li\u003e\n\u003cli\u003eSuperior crack resistance under detonation or pre-ignition\u003c\/li\u003e\n\u003cli\u003eCoated skirts on all Twin Cam applications for reduced friction\u003c\/li\u003e\n\u003cli\u003eIncludes rings, wrist pins, and wrist pin locks for a complete kit\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003ePerformance-Ready for Any Challenge\u003c\/h3\u003e\u003cp\u003eWhether you're building a high-horsepower drag bike or a robust street machine, these KB Forged Alloy Pistons provide the foundation you need. The standard bore design simplifies installation for many Twin Cam 88 to 95ci applications, while the included components ensure you have everything required for a professional-grade assembly. Always verify fitment with your specific engine specifications.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB904C.STD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745152367\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine:\u003c\/strong\u003e Twin Cam 88 to 95ci\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 9.25:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBore:\u003c\/strong\u003e Standard\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 5.0333 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat is included with these pistons?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThe piston pair includes all necessary rings, wrist pins, and wrist pin locks for a complete installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eCan these pistons be used in a stock engine?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eYes, while designed for performance, these forged pistons can be used in a stock engine. Their strength provides an excellent foundation for future upgrades.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eAre these pistons compatible with forced induction?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eAbsolutely. These forged alloy pistons are built to handle the demands of power adders like nitrous or boost, offering enhanced durability under high-stress conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Forged Alloy Piston 9.25:1 STD - Harley Twin Cam 88 to 95ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-forged-alloy-piston-pistons-tc88-to-95ci-9-25-1-std-824-01500\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What is included with these pistons?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The piston pair includes all necessary rings, wrist pins, and wrist pin locks for a complete installation.\"}},{\"@type\":\"Question\",\"name\":\"Can these pistons be used in a stock engine?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, while designed for performance, these forged pistons can be used in a stock engine. Their strength provides an excellent foundation for future upgrades.\"}},{\"@type\":\"Question\",\"name\":\"Are these pistons compatible with forced induction?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Absolutely. These forged alloy pistons are built to handle the demands of power adders like nitrous or boost, offering enhanced durability under high-stress conditions.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035466096751,"sku":"824-01500","price":337.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_3cb7cfd7-d8a8-409b-8bd4-f05def51959a.png?v=1779561765"},{"product_id":"kb-pistons-forged-alloy-piston-pistons-tc88-to-95ci-10-5-1-std-824-01506","title":"Kb Pistons Forged Alloy Piston 10.5:1 STD - Harley Twin Cam 88 to 95ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eElevate the performance of your Twin Cam 88 to 95ci engine with KB Pistons Forged Alloy Pistons. Featuring a 10.5:1 compression ratio and standard size, these pistons are built for the demands of high-performance riding.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003e4032 forged alloy with 11% silicon\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eSuperior crack resistance under detonation\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eCoated skirts for long-term durability\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eIncludes rings, wrist pins, and locks\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eIdeal for power adders and race applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eConstructed from a robust 4032 forged alloy with an 11% silicon content, these pistons offer superior crack resistance under the most extreme conditions, including detonation and pre-ignition. This makes them a prime choice for street or race applications where power adders like nitrous or boost are utilized, ensuring maximum reliability and longevity.\u003c\/p\u003e\u003ch3\u003eEngineered for High-Stress Environments\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMade from 4032 forged alloy with 11% silicon for strength\u003c\/li\u003e\n\u003cli\u003eSuperior crack resistance to withstand detonation and pre-ignition\u003c\/li\u003e\n\u003cli\u003eCoated skirts on all Twin Cam applications for reduced wear\u003c\/li\u003e\n\u003cli\u003eDesigned for demanding street and race setups\u003c\/li\u003e\n\u003cli\u003eIncludes rings, wrist pins, and wrist pin locks for easy installation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eUnleash Your Twin Cam's Full Potential\u003c\/h3\u003e\u003cp\u003eThese KB Forged Alloy Pistons provide the strength and resilience needed to unlock the full potential of your Twin Cam 88 to 95ci engine. The standard size simplifies the upgrade process for many applications, while the included rings, wrist pins, and locks ensure you have a complete kit for a professional installation. Always consult your engine builder to confirm specific fitment and tuning requirements for your build.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB906C.STD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745152763\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 10.5:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine Size:\u003c\/strong\u003e Twin Cam 88 to 95ci\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e Standard\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 5.9 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 5.8 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 5.7 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.6 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eAre rings and wrist pins included with these pistons?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eYes, all necessary rings, wrist pins, and wrist pin locks are included with the piston pair for a complete installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat type of applications are these pistons best suited for?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThese forged alloy pistons are ideal for Harley-Davidson Twin Cam 88 to 95ci engines in street or race applications, especially those utilizing power adders like nitrous or boost.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWill these pistons require engine tuning?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eAny change to compression ratio or engine internals, especially with power adders, will require a proper dyno tune to ensure optimal performance and engine longevity. Consult with a professional tuner.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Forged Alloy Piston 10.5:1 STD - Harley Twin Cam 88 to 95ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-forged-alloy-piston-pistons-tc88-to-95ci-10-5-1-std-824-01506\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Are rings and wrist pins included with these pistons?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, all necessary rings, wrist pins, and wrist pin locks are included with the piston pair for a complete installation.\"}},{\"@type\":\"Question\",\"name\":\"What type of applications are these pistons best suited for?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"These forged alloy pistons are ideal for Harley-Davidson Twin Cam 88 to 95ci engines in street or race applications, especially those utilizing power adders like nitrous or boost.\"}},{\"@type\":\"Question\",\"name\":\"Will these pistons require engine tuning?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Any change to compression ratio or engine internals, especially with power adders, will require a proper dyno tune to ensure optimal performance and engine longevity. Consult with a professional tuner.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035466129519,"sku":"824-01506","price":337.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_5ddd679a-deb0-48a5-8124-776ad1a53674.png?v=1779561854"},{"product_id":"kb-pistons-forged-alloy-piston-pistons-tc88-to-95ci-10-5-1-005-824-01507","title":"KB Pistons Forged Alloy 10.5:1 .005\" Oversized Piston Kit - Harley Twin Cam 88 to 95ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eUnleash the full potential of your Twin Cam 88 engine with this KB Pistons forged alloy piston kit, engineered for a 95 cubic inch big bore conversion. These pistons feature a 10.5:1 compression ratio and a .005 inch oversized bore, perfect for riders pushing their V-twin harder. Built to withstand the demands of high-performance applications, they provide the foundation for a reliable and powerful engine build.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003eUpgrade Twin Cam 88 to 95ci with 10.5:1 compression\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eRobust 4032 forged alloy construction with 11% silicon\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eSuperior crack resistance against detonation and pre-ignition\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eCoated skirts for reduced friction and extended piston life\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eIncludes rings, wrist pins, and wrist pin locks for complete assembly\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eIdeal for street or race applications with power adders\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhen you're building out a Twin Cam for serious power, whether naturally aspirated or with a power adder, your pistons are the foundation. This KB Pistons forged alloy piston kit is designed for Twin Cam 88 engines bored to 95 cubic inches, offering a 10.5:1 compression ratio and a .005 inch oversized bore. Crafted from a robust 4032 forged alloy with 11% silicon content, these pistons are built for superior crack resistance, especially under detonation or pre-ignition scenarios often encountered with aggressive tunes or forced induction.\u003c\/p\u003e\u003ch3\u003eEngineered for Extreme Performance\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eForged 4032 alloy with 11% silicon content for exceptional strength\u003c\/li\u003e\n\u003cli\u003eFully machined construction enhances crack resistance under high stress\u003c\/li\u003e\n\u003cli\u003eCoated skirts reduce friction and improve longevity on Twin Cam applications\u003c\/li\u003e\n\u003cli\u003eOptimized for street or race use, including setups with power adders\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe Core of a High-Performance Build\u003c\/h3\u003e\u003cp\u003eThis piston kit is a critical component for any Twin Cam owner looking to increase displacement and compression. The included rings, wrist pins, and wrist pin locks mean you have a complete solution for your reciprocating assembly. Whether you're chasing more torque for the street or building a dedicated race machine, these pistons are designed to deliver consistent performance and durability, allowing you to run your engine harder with confidence.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB906C.005\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745152787\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBore Size:\u003c\/strong\u003e .005 oversized (95 cubic inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 10.5:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 4032 forged alloy\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.6 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat engine modifications are required for these pistons?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThese pistons are designed for Twin Cam 88 engines that have been bored to 95 cubic inches with a .005 inch overbore. Your cylinders will require machine work to accommodate this size.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eAre these pistons suitable for engines with forced induction or nitrous?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eYes, the 4032 forged alloy with 11% silicon content provides excellent crack resistance, making them well-suited for engines running power adders like superchargers, turbos, or nitrous oxide.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat is included with this piston kit?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThis kit includes a pair of forged alloy pistons, all necessary piston rings, wrist pins, and wrist pin locks for a complete installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"KB Pistons Forged Alloy 10.5:1 .005\\\" Oversized Piston Kit - Harley Twin Cam 88 to 95ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-forged-alloy-piston-pistons-tc88-to-95ci-10-5-7\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What engine modifications are required for these pistons?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"These pistons are designed for Twin Cam 88 engines that have been bored to 95 cubic inches with a .005 inch overbore. Your cylinders will require machine work to accommodate this size.\"}},{\"@type\":\"Question\",\"name\":\"Are these pistons suitable for engines with forced induction or nitrous?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, the 4032 forged alloy with 11% silicon content provides excellent crack resistance, making them well-suited for engines running power adders like superchargers, turbos, or nitrous oxide.\"}},{\"@type\":\"Question\",\"name\":\"What is included with this piston kit?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This kit includes a pair of forged alloy pistons, all necessary piston rings, wrist pins, and wrist pin locks for a complete installation.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035466195055,"sku":"824-01507","price":337.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_0e7b7810-62c5-4fc7-8e90-68869ab7e76a.png?v=1779561935"},{"product_id":"kb-pistons-forged-alloy-piston-pistons-tc88-to-95ci-10-5-1-010-824-01508","title":"KB Pistons Forged Alloy 10.5:1 .010\" Oversized Piston Kit - Harley Twin Cam 88 to 95ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eUpgrade your Twin Cam 88 engine to a 95 cubic inch displacement with this KB Pistons forged alloy piston kit. Featuring a 10.5:1 compression ratio and a .010 inch oversized bore, these pistons are engineered for riders seeking serious performance gains. Their robust construction ensures durability even under the most demanding riding conditions, making them ideal for high-output builds.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003eConvert Twin Cam 88 to 95ci with 10.5:1 compression\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eDurable 4032 forged alloy with 11% silicon\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eEnhanced crack resistance for high-performance use\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eCoated skirts for reduced friction and improved wear\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eComplete kit with rings, wrist pins, and wrist pin locks\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eIdeal for power-adder equipped street or race bikes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor riders pushing the limits of their Twin Cam 88, a big bore conversion to 95 cubic inches is a common path to more power. This KB Pistons forged alloy piston kit provides the necessary components, with a 10.5:1 compression ratio and a .010 inch oversized bore. Precision-machined from 4032 forged alloy with an 11% silicon content, these pistons are designed to offer superior crack resistance, especially crucial when running power adders or higher compression tunes. They are a solid choice for both aggressive street riding and dedicated race applications.\u003c\/p\u003e\u003ch3\u003eBuilt for Demanding Engine Builds\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eConstructed from 4032 forged alloy with high silicon content\u003c\/li\u003e\n\u003cli\u003eExceptional crack resistance against detonation and pre-ignition\u003c\/li\u003e\n\u003cli\u003eCoated skirts reduce friction and enhance piston longevity\u003c\/li\u003e\n\u003cli\u003eIncludes all rings, wrist pins, and wrist pin locks for a complete setup\u003c\/li\u003e\n\u003cli\u003eDesigned for Twin Cam 88 to 95ci conversions\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReliability Under Pressure\u003c\/h3\u003e\u003cp\u003eWhen you're upgrading your Twin Cam, confidence in your internal components is key. These KB Pistons provide that assurance, built to handle the increased stresses of a higher-compression, larger-displacement engine. The included rings, wrist pins, and wrist pin locks simplify the assembly process, giving you a comprehensive solution for your big bore project. Pair them with a performance cam and a proper dyno tune for maximum power delivery.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB906C.010\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745152800\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 10.5:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOversized:\u003c\/strong\u003e .010\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 4032 forged alloy\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.6 lbs per pair\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWill these pistons require cylinder boring?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eYes, these pistons feature a .010 inch oversized bore and are intended for Twin Cam 88 cylinders that have been bored out to 95 cubic inches, requiring machine shop services.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eAre these pistons compatible with forced induction systems?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eAbsolutely. The 4032 forged alloy construction with 11% silicon content is specifically engineered to provide superior crack resistance under detonation, making them ideal for supercharged, turbocharged, or nitrous-fed engines.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat components are supplied with this piston set?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThis kit comes complete with a pair of forged pistons, all necessary piston rings, wrist pins, and wrist pin locks, providing everything you need for the piston assembly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"KB Pistons Forged Alloy 10.5:1 .010\\\" Oversized Piston Kit - Harley Twin Cam 88 to 95ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-forged-alloy-piston-pistons-tc88-to-95ci-10-5-8\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Will these pistons require cylinder boring?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, these pistons feature a .010 inch oversized bore and are intended for Twin Cam 88 cylinders that have been bored out to 95 cubic inches, requiring machine shop services.\"}},{\"@type\":\"Question\",\"name\":\"Are these pistons compatible with forced induction systems?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Absolutely. The 4032 forged alloy construction with 11% silicon content is specifically engineered to provide superior crack resistance under detonation, making them ideal for supercharged, turbocharged, or nitrous-fed engines.\"}},{\"@type\":\"Question\",\"name\":\"What components are supplied with this piston set?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This kit comes complete with a pair of forged pistons, all necessary piston rings, wrist pins, and wrist pin locks, providing everything you need for the piston assembly.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035466227823,"sku":"824-01508","price":337.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_150f8e92-f483-4d58-a824-3de6bd6649dc.png?v=1779562006"},{"product_id":"kb-pistons-forged-alloy-piston-pistons-tc88-to-95ci-10-5-1-020-824-01509","title":"KB Pistons Forged Alloy 10.5:1 .020\" Oversized Piston Kit - Harley Twin Cam 88 to 95ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eAchieve a significant performance boost for your Twin Cam 88 engine with this KB Pistons forged alloy piston kit, designed for a 95 cubic inch big bore conversion. Featuring a 10.5:1 compression ratio and a .020 inch oversized bore, these pistons are built for riders demanding maximum power and resilience. Their advanced construction ensures they can handle the stresses of high-performance riding, whether on the street or the track.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003eUpgrade Twin Cam 88 to 95ci with 10.5:1 compression\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eForged 4032 alloy with 11% silicon for high strength\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eSuperior crack resistance, ideal for power adders\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eCoated skirts reduce friction and piston noise\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eIncludes wrist pins, wrist pin locks, and full ring set\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eEngineered for street and race applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhen increasing the displacement and compression of your Twin Cam 88 to 95 cubic inches, choosing the right pistons is crucial for longevity and performance. This KB Pistons forged alloy kit offers a 10.5:1 compression ratio and a .020 inch oversized bore, providing a robust foundation for your engine build. Crafted from 4032 forged alloy with an 11% silicon content, these pistons are engineered for superior crack resistance, particularly under the extreme conditions of detonation or pre-ignition. They are a prime choice for high-performance street bikes and race applications, especially those utilizing power adders.\u003c\/p\u003e\u003ch3\u003eUncompromising Strength and Durability\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePremium 4032 forged alloy with 11% silicon for extreme strength\u003c\/li\u003e\n\u003cli\u003eEnhanced crack resistance against detonation and pre-ignition events\u003c\/li\u003e\n\u003cli\u003eCoated skirts reduce friction, minimize piston noise, and extend engine life\u003c\/li\u003e\n\u003cli\u003eIncludes wrist pins, wrist pin locks, and a complete ring set\u003c\/li\u003e\n\u003cli\u003eOptimized for Twin Cam 88 to 95ci big bore conversions\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eBuilt for the Toughest Demands\u003c\/h3\u003e\u003cp\u003eThese KB Pistons are more than just replacement parts; they are a performance upgrade designed to elevate your Twin Cam's capabilities. The comprehensive kit includes wrist pins, wrist pin locks, and a complete ring set, ensuring a seamless and reliable installation. Whether you're planning a cam swap, cylinder head work, or adding forced induction, these pistons provide the necessary internal strength to support your power goals and deliver consistent, hard-hitting performance.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB906C.020\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745152824\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 10.5:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBore Oversized:\u003c\/strong\u003e .020 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine Application:\u003c\/strong\u003e Twin Cam 88 to 95ci\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.6 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWill my cylinders need to be bored for these pistons?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eYes, these pistons are .020 inch oversized and require your Twin Cam 88 cylinders to be bored out to 95 cubic inches by a qualified machine shop for proper fitment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eAre these pistons suitable for turbocharged or supercharged engines?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eAbsolutely. The 4032 forged alloy with its 11% silicon content is specifically chosen for its superior crack resistance under detonation and pre-ignition, making these pistons an excellent choice for forced induction setups.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat is included with the purchase of these pistons?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThis kit comes complete with a pair of forged pistons, a full set of piston rings, wrist pins, and wrist pin locks, providing everything needed for piston installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"KB Pistons Forged Alloy 10.5:1 .020\\\" Oversized Piston Kit - Harley Twin Cam 88 to 95ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-forged-alloy-piston-pistons-tc88-to-95ci-10-5-9\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Will my cylinders need to be bored for these pistons?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, these pistons are .020 inch oversized and require your Twin Cam 88 cylinders to be bored out to 95 cubic inches by a qualified machine shop for proper fitment.\"}},{\"@type\":\"Question\",\"name\":\"Are these pistons suitable for turbocharged or supercharged engines?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Absolutely. The 4032 forged alloy with its 11% silicon content is specifically chosen for its superior crack resistance under detonation and pre-ignition, making these pistons an excellent choice for forced induction setups.\"}},{\"@type\":\"Question\",\"name\":\"What is included with the purchase of these pistons?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This kit comes complete with a pair of forged pistons, a full set of piston rings, wrist pins, and wrist pin locks, providing everything needed for piston installation.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035466260591,"sku":"824-01509","price":337.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_f504eca5-02a7-4350-afc4-0522ec433007.png?v=1779561865"},{"product_id":"kb-pistons-forged-alloy-piston-pistons-tc96-to-103ci-9-5-1-std-824-01522","title":"KB Pistons Forged Alloy 9.5:1 Standard Bore Piston Kit - Harley Twin Cam 96 to 103ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eElevate the performance of your Twin Cam 96 or 103ci engine with this KB Pistons forged alloy piston kit. Designed with a 9.5:1 compression ratio and standard bore size, these pistons provide a robust foundation for increased power and reliability. Built from durable 4032 forged alloy, they are ready for the demands of high-performance riding.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003eUpgrade Twin Cam 96 to 103ci with 9.5:1 compression\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eRobust 4032 forged alloy with 11% silicon\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eSuperior crack resistance for demanding use\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eCoated skirts reduce friction and wear\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eComplete kit with rings, wrist pins, and wrist pin locks\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eOptimized for street or race applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhen you're looking to upgrade your Twin Cam 96 or 103ci engine, a strong set of pistons is non-negotiable. This KB Pistons forged alloy piston kit offers a 9.5:1 compression ratio in a standard bore size, making it a direct fit for compatible cylinders. Crafted from 4032 forged alloy with an 11% silicon content, these pistons are engineered for superior crack resistance, especially under detonation, which is critical for engines running aggressive tunes or power adders. Whether you're building a performance street machine or a race bike, these pistons provide the durability you need.\u003c\/p\u003e\u003ch3\u003eBuilt for Reliable Power\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eConstructed from 4032 forged alloy with 11% silicon content\u003c\/li\u003e\n\u003cli\u003eSuperior crack resistance against detonation and pre-ignition\u003c\/li\u003e\n\u003cli\u003eCoated skirts reduce friction and improve longevity on Twin Cam applications\u003c\/li\u003e\n\u003cli\u003eIncludes all rings, wrist pins, and wrist pin locks for a complete assembly\u003c\/li\u003e\n\u003cli\u003eDesigned for Twin Cam 96 to 103ci engines with 9.5:1 compression\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe Foundation of a Stronger Engine\u003c\/h3\u003e\u003cp\u003eThese KB Pistons are more than just replacement parts; they are a performance enhancement designed to bolster your Twin Cam's internal strength. The included rings, wrist pins, and wrist pin locks ensure you have all the necessary components for a comprehensive piston installation. Ideal for riders seeking increased reliability and the ability to handle more aggressive engine setups, these pistons are a smart investment for any serious V-twin builder looking to get the most out of their 96 or 103ci motor.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB907C.STD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745153128\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 9.5:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDisplacement Range:\u003c\/strong\u003e Twin Cam 96 to 103ci\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight per Pair:\u003c\/strong\u003e 2.5 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eAre these pistons a direct replacement for my Twin Cam 96\/103 engine?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eYes, these are standard bore pistons designed for Twin Cam 96 to 103ci engines with a 9.5:1 compression ratio, making them a suitable replacement or upgrade without requiring cylinder boring for standard applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eCan these pistons handle forced induction or nitrous?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eAbsolutely. The 4032 forged alloy with 11% silicon content provides excellent crack resistance, making them well-suited for engines running power adders like superchargers, turbos, or nitrous oxide.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat is included in this piston kit?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThis kit includes a pair of forged alloy pistons, all necessary piston rings, wrist pins, and wrist pin locks, providing a complete solution for your piston assembly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"KB Pistons Forged Alloy 9.5:1 Standard Bore Piston Kit - Harley Twin Cam 96 to 103ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-forged-alloy-piston-pistons-tc96-to-103ci-9-5-1-std-824-01522\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Are these pistons a direct replacement for my Twin Cam 96\/103 engine?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, these are standard bore pistons designed for Twin Cam 96 to 103ci engines with a 9.5:1 compression ratio, making them a suitable replacement or upgrade without requiring cylinder boring for standard applications.\"}},{\"@type\":\"Question\",\"name\":\"Can these pistons handle forced induction or nitrous?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Absolutely. The 4032 forged alloy with 11% silicon content provides excellent crack resistance, making them well-suited for engines running power adders like superchargers, turbos, or nitrous oxide.\"}},{\"@type\":\"Question\",\"name\":\"What is included in this piston kit?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This kit includes a pair of forged alloy pistons, all necessary piston rings, wrist pins, and wrist pin locks, providing a complete solution for your piston assembly.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035466293359,"sku":"824-01522","price":337.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_bd6c2cd6-2298-4137-b296-8f5dd6cbddc4.png?v=1779561868"},{"product_id":"kb-pistons-forged-alloy-piston-pistons-tc96-to-103ci-9-5-1-005-824-01523","title":"KB Pistons Forged Alloy 9.5:1 .005\" Oversized Piston Kit - Harley Twin Cam 96 to 103ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eMaximize the output of your Twin Cam 96 or 103ci engine with this KB Pistons forged alloy piston kit. Featuring a 9.5:1 compression ratio and a .005 inch oversized bore, these pistons are engineered for riders seeking a robust and reliable foundation for their performance build. Crafted for superior strength, they are ready to handle the increased demands of a modified V-twin.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003eUpgrade Twin Cam 96 to 103ci with 9.5:1 compression\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eForged 4032 alloy with 11% silicon for strength\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eSuperior crack resistance for power adders\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eCoated skirts for reduced friction and extended life\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eComplete kit with rings, wrist pins, and wrist pin locks\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eIdeal for demanding street or race applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhen rebuilding or upgrading your Twin Cam 96 or 103ci engine, choosing pistons that can withstand serious power is paramount. This KB Pistons forged alloy kit offers a 9.5:1 compression ratio and a .005 inch oversized bore, providing a solid upgrade path. Constructed from 4032 forged alloy with an 11% silicon content, these pistons are specifically designed for superior crack resistance, especially under the extreme conditions of detonation or pre-ignition. This makes them an excellent choice for both high-performance street applications and race-oriented builds, particularly those running power adders.\u003c\/p\u003e\u003ch3\u003eEngineered for High-Stress Applications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePremium 4032 forged alloy with 11% silicon for ultimate strength\u003c\/li\u003e\n\u003cli\u003eSuperior crack resistance against detonation and pre-ignition\u003c\/li\u003e\n\u003cli\u003eCoated skirts reduce friction and enhance longevity for Twin Cam and Sportster\u003c\/li\u003e\n\u003cli\u003eIncludes all rings, wrist pins, and wrist pin locks for a complete assembly\u003c\/li\u003e\n\u003cli\u003eDesigned for Twin Cam 96 to 103ci with 9.5:1 compression\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe Heart of a Performance V-Twin\u003c\/h3\u003e\u003cp\u003eThese KB Pistons are engineered to be the core of a powerful and reliable V-twin engine build. The kit comes complete with piston rings, wrist pins, and wrist pin locks, simplifying your assembly process. Whether you're performing a refresh, increasing compression, or preparing for forced induction, these pistons provide the durability and performance characteristics needed to push your Harley-Davidson or Indian Motorcycle to its limits, delivering consistent power and peace of mind.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB907C.005\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745153142\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 9.5:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOversized Bore:\u003c\/strong\u003e .005 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAlloy:\u003c\/strong\u003e 4032 forged with 11% silicon\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.6 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWill my cylinders need to be bored for these pistons?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eYes, these pistons are .005 inch oversized and require your Twin Cam 96 or 103ci cylinders to be bored to match by a qualified machine shop for proper fitment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eAre these pistons suitable for engines with forced induction?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eAbsolutely. The 4032 forged alloy with 11% silicon content is specifically engineered to provide superior crack resistance under detonation, making them an excellent choice for supercharged, turbocharged, or nitrous-fed engines.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat components are included with this piston set?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThis kit comes complete with a pair of forged pistons, a full set of piston rings, wrist pins, and wrist pin locks, providing everything needed for piston installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"KB Pistons Forged Alloy 9.5:1 .005\\\" Oversized Piston Kit - Harley Twin Cam 96 to 103ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-forged-alloy-piston-pistons-tc96-to-103ci-9-5-3\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Will my cylinders need to be bored for these pistons?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, these pistons are .005 inch oversized and require your Twin Cam 96 or 103ci cylinders to be bored to match by a qualified machine shop for proper fitment.\"}},{\"@type\":\"Question\",\"name\":\"Are these pistons suitable for engines with forced induction?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Absolutely. The 4032 forged alloy with 11% silicon content is specifically engineered to provide superior crack resistance under detonation, making them an excellent choice for supercharged, turbocharged, or nitrous-fed engines.\"}},{\"@type\":\"Question\",\"name\":\"What components are included with this piston set?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This kit comes complete with a pair of forged pistons, a full set of piston rings, wrist pins, and wrist pin locks, providing everything needed for piston installation.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035467112559,"sku":"824-01523","price":337.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_f25e7f72-f797-471f-8773-d95edc876c06.png?v=1779562011"},{"product_id":"kb-pistons-forged-alloy-piston-pistons-tc96-to-103ci-9-5-1-010-824-01524","title":"KB Pistons Forged Alloy 9.5:1 .010\" Oversized Piston Kit - Harley Twin Cam 96 to 103ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eUpgrade your Twin Cam 96 or 103ci engine with this KB Pistons forged alloy piston kit, featuring a 9.5:1 compression ratio and a .010 inch oversized bore. These pistons are built for riders who demand uncompromising strength and performance from their V-twin. Engineered to handle high stress, they provide a reliable foundation for any serious engine build.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003eUpgrade Twin Cam 96 to 103ci with 9.5:1 compression\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eForged 4032 alloy with 11% silicon for strength\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eSuperior crack resistance, perfect for power adders\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eCoated skirts reduce friction and extend life\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eComplete kit with rings, wrist pins, and wrist pin locks\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eIdeal for demanding street or race applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor riders looking to get the most out of their Twin Cam 96 or 103ci engine, a robust piston kit is essential. This KB Pistons forged alloy kit provides a 9.5:1 compression ratio and a .010 inch oversized bore, offering a performance advantage. Crafted from 4032 forged alloy with an 11% silicon content, these pistons are specifically engineered for superior crack resistance under detonation and pre-ignition, making them ideal for high-performance street applications and race builds, especially with power adders. They are built to endure the rigors of aggressive riding and increased engine output.\u003c\/p\u003e\u003ch3\u003eEngineered for Maximum Durability\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eConstructed from 4032 forged alloy with 11% silicon for extreme durability\u003c\/li\u003e\n\u003cli\u003eSuperior crack resistance against detonation and pre-ignition\u003c\/li\u003e\n\u003cli\u003eCoated skirts reduce friction and enhance piston longevity for Twin Cam and Sportster\u003c\/li\u003e\n\u003cli\u003eIncludes all rings, wrist pins, and wrist pin locks for a complete assembly\u003c\/li\u003e\n\u003cli\u003eDesigned for Twin Cam 96 to 103ci engines with 9.5:1 compression\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe Foundation for Serious Power\u003c\/h3\u003e\u003cp\u003eThese KB Pistons are more than just an upgrade; they are a critical component for any Twin Cam owner looking to extract maximum power and ensure long-term reliability. The kit includes all necessary rings, wrist pins, and wrist pin locks, providing a comprehensive solution for your engine build. Whether you're optimizing for a high-performance cam, cylinder head work, or preparing for forced induction, these pistons offer the internal strength and resilience required to support your most ambitious power goals.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB907C.010\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745153166\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine Application:\u003c\/strong\u003e Twin Cam 96 to 103 cubic inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 9.5:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOversizing:\u003c\/strong\u003e .010 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e Pair (2 pistons)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.6 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWill cylinder boring be necessary for these pistons?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eYes, these pistons are .010 inch oversized and require your Twin Cam 96 or 103ci cylinders to be bored to match by a qualified machine shop for proper fitment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eAre these pistons suitable for engines using forced induction or nitrous?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eAbsolutely. The 4032 forged alloy with 11% silicon content is specifically chosen for its superior crack resistance under detonation, making these pistons an excellent choice for supercharged, turbocharged, or nitrous-fed engines.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat is included with this piston kit?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThis kit comes complete with a pair of forged pistons, a full set of piston rings, wrist pins, and wrist pin locks, providing everything needed for piston installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"KB Pistons Forged Alloy 9.5:1 .010\\\" Oversized Piston Kit - Harley Twin Cam 96 to 103ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-forged-alloy-piston-pistons-tc96-to-103ci-9-5-4\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Will cylinder boring be necessary for these pistons?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, these pistons are .010 inch oversized and require your Twin Cam 96 or 103ci cylinders to be bored to match by a qualified machine shop for proper fitment.\"}},{\"@type\":\"Question\",\"name\":\"Are these pistons suitable for engines using forced induction or nitrous?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Absolutely. The 4032 forged alloy with 11% silicon content is specifically chosen for its superior crack resistance under detonation, making these pistons an excellent choice for supercharged, turbocharged, or nitrous-fed engines.\"}},{\"@type\":\"Question\",\"name\":\"What is included with this piston kit?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This kit comes complete with a pair of forged pistons, a full set of piston rings, wrist pins, and wrist pin locks, providing everything needed for piston installation.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035467145327,"sku":"824-01524","price":337.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_0391ad0b-2e86-4914-a13f-5de336c41b01.png?v=1779565608"},{"product_id":"kb-pistons-forged-alloy-piston-pistons-tc96-to-103ci-9-5-1-020-824-01525","title":"Kb Pistons Forged Alloy 9.5:1 .020 Over Piston Kit - Harley Twin Cam 96-103ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eUnleash the full potential of your Twin Cam 96 to 103ci engine with Kb Pistons forged alloy pistons. Designed for riders pushing the limits, these pistons offer a 9.5:1 compression ratio and a .020 oversized bore for enhanced performance.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003eForged 4032 alloy for maximum strength and resilience\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003e9.5:1 compression ratio for a performance boost\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003e.020 oversized bore for optimal cylinder refresh\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eCoated skirts reduce friction and wear\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eIncludes rings, wrist pins, and locks for complete installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhen you're building a Twin Cam engine that's going to see serious street miles or track time, especially with power adders, you need components that can take the heat. Kb Pistons delivers with this forged alloy piston kit, purpose-built for Twin Cam 96 to 103ci applications. The 9.5:1 compression ratio is a solid upgrade, and the .020 oversized bore allows for a fresh cylinder hone, ensuring optimal ring seal and power.\u003c\/p\u003e\u003ch3\u003eEngineered for Extreme Conditions\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eConstructed from 4032 forged alloy with 11% silicon content for durability\u003c\/li\u003e\n\u003cli\u003eResists cracking and pre-ignition under high-stress conditions\u003c\/li\u003e\n\u003cli\u003eCoated skirts reduce friction and extend piston life\u003c\/li\u003e\n\u003cli\u003eIncludes all necessary rings, wrist pins, and wrist pin locks\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eBoost-Ready Performance\u003c\/h3\u003e\u003cp\u003eThese pistons are ideal for riders who are running power adders like nitrous oxide or superchargers. The robust forged construction provides the peace of mind that your bottom end can handle the increased cylinder pressures. Pair these with a performance cam and a proper dyno tune for a significant bump in usable torque and horsepower.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB907C.020\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745153180\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBore Size:\u003c\/strong\u003e .020 oversized\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 9.5:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine Compatibility:\u003c\/strong\u003e Twin Cam 96 to 103ci\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.6 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat is included with this piston kit?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThis kit includes a pair of pistons, all necessary rings, wrist pins, and wrist pin locks for a complete installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eAre these pistons suitable for engines with power adders?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eYes, the 4032 forged alloy construction is specifically engineered to handle the increased stress and heat generated by power adders like nitrous or superchargers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eDo I need to bore my cylinders for these pistons?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThese pistons are .020 oversized, meaning your cylinders will need to be bored and honed to this specification for proper fitment. Always confirm with your engine builder.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Forged Alloy 9.5:1 .020 Over Piston Kit - Harley Twin Cam 96-103ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-forged-alloy-piston-pistons-tc96-to-103ci-9-5-5\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What is included with this piston kit?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This kit includes a pair of pistons, all necessary rings, wrist pins, and wrist pin locks for a complete installation.\"}},{\"@type\":\"Question\",\"name\":\"Are these pistons suitable for engines with power adders?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, the 4032 forged alloy construction is specifically engineered to handle the increased stress and heat generated by power adders like nitrous or superchargers.\"}},{\"@type\":\"Question\",\"name\":\"Do I need to bore my cylinders for these pistons?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"These pistons are .020 oversized, meaning your cylinders will need to be bored and honed to this specification for proper fitment. Always confirm with your engine builder.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035467178095,"sku":"824-01525","price":337.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_ed7279a9-46d0-49ea-b390-14b992eabd13.png?v=1779561767"},{"product_id":"kb-pistons-forged-alloy-piston-pistons-tc96-to-103ci-10-5-1-std-824-01527","title":"Kb Pistons Forged Alloy 10.5:1 Standard Bore Piston Kit - Harley Twin Cam 96-103ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eElevate your Twin Cam 96 to 103ci engine's performance with Kb Pistons forged alloy pistons. These pistons feature a 10.5:1 compression ratio and a standard bore, perfect for riders seeking more power without major cylinder modifications.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003e10.5:1 compression ratio for increased power\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eStandard bore size for straightforward installation\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eForged 4032 alloy construction for extreme durability\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eResists detonation and pre-ignition in demanding conditions\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eIncludes all rings, wrist pins, and locks\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBuilding a high-performance Twin Cam means starting with a solid foundation. This Kb Pistons forged alloy piston kit delivers precisely that, designed for Twin Cam 96 to 103ci engines. The 10.5:1 compression ratio is a significant step up from stock, providing a noticeable increase in power and throttle response. With a standard bore size, these pistons are ideal for engines that don't require an overbore, simplifying your build process.\u003c\/p\u003e\u003ch3\u003eUncompromising Strength and Durability\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eForged from 4032 alloy with 11% silicon for superior structural integrity\u003c\/li\u003e\n\u003cli\u003eEngineered to resist cracking and pre-ignition under extreme loads\u003c\/li\u003e\n\u003cli\u003eFully machined construction ensures precise fitment and performance\u003c\/li\u003e\n\u003cli\u003eCoated skirts minimize friction and enhance piston longevity\u003c\/li\u003e\n\u003cli\u003eComplete kit with rings, wrist pins, and wrist pin locks included\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOptimized for Power and Reliability\u003c\/h3\u003e\u003cp\u003eWhether you're hitting the open road or the drag strip, these pistons are built to withstand the demands of a high-output V-twin. Their robust design makes them an excellent choice for engines utilizing power adders like nitrous or superchargers. For optimal results, consider pairing these pistons with a performance camshaft and a custom dyno tune to fully unlock your engine's potential.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB909C.STD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745152886\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 10.5:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine Displacement:\u003c\/strong\u003e 96 to 103ci Twin Cam\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 6 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 5 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 5 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.55 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat parts are included in this piston kit?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThis kit comes complete with a pair of pistons, all necessary piston rings, wrist pins, and wrist pin locks.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eCan these pistons be used with a supercharger or nitrous?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eYes, the 4032 forged alloy construction is specifically designed to provide superior crack resistance, making these pistons suitable for engines running power adders.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eDo I need to re-bore my cylinders for these pistons?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThese pistons are standard bore, meaning they are designed for cylinders that do not require an overbore. Always verify your cylinder condition before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Forged Alloy 10.5:1 Standard Bore Piston Kit - Harley Twin Cam 96-103ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-forged-alloy-piston-pistons-tc96-to-103ci-10-5-1-std-824-01527\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What parts are included in this piston kit?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This kit comes complete with a pair of pistons, all necessary piston rings, wrist pins, and wrist pin locks.\"}},{\"@type\":\"Question\",\"name\":\"Can these pistons be used with a supercharger or nitrous?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, the 4032 forged alloy construction is specifically designed to provide superior crack resistance, making these pistons suitable for engines running power adders.\"}},{\"@type\":\"Question\",\"name\":\"Do I need to re-bore my cylinders for these pistons?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"These pistons are standard bore, meaning they are designed for cylinders that do not require an overbore. Always verify your cylinder condition before ordering.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035467210863,"sku":"824-01527","price":337.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_5893fbbc-3d75-4583-bbb7-ae3026ae711f.png?v=1779561767"},{"product_id":"kb-pistons-forged-alloy-piston-pistons-tc96-to-103ci-10-5-1-010-824-01529","title":"Kb Pistons Forged Alloy 10.5:1 .010 Over Piston Kit - Harley Twin Cam 96-103ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003ePush your Twin Cam 96 to 103ci engine to new levels with Kb Pistons forged alloy pistons. Featuring a 10.5:1 compression ratio and a .010 oversized bore, these pistons are engineered for riders demanding more power and durability.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003e10.5:1 compression ratio for significant power increase\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003e.010 oversized bore for cylinder refresh\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eForged 4032 alloy for superior crack resistance\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eCoated skirts for reduced friction and extended life\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eIncludes all rings, wrist pins, and wrist pin locks\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhen you're chasing more horsepower and torque from your Twin Cam, a piston upgrade is a critical step. This Kb Pistons forged alloy piston kit is designed for Twin Cam 96 to 103ci engines, offering a stout 10.5:1 compression ratio. The .010 oversized bore provides the perfect opportunity to clean up your cylinders with a light hone, ensuring optimal ring seal and preparing your engine for serious performance gains.\u003c\/p\u003e\u003ch3\u003eBuilt for High-Performance Applications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eCrafted from 4032 forged alloy with 11% silicon content for extreme resilience\u003c\/li\u003e\n\u003cli\u003eMinimizes risk of cracking and pre-ignition under demanding conditions\u003c\/li\u003e\n\u003cli\u003eFully machined for precision fit and consistent operation\u003c\/li\u003e\n\u003cli\u003eCoated skirts reduce friction, prolonging piston and cylinder life\u003c\/li\u003e\n\u003cli\u003eComplete set includes rings, wrist pins, and wrist pin locks\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReady for the Road or Race Track\u003c\/h3\u003e\u003cp\u003eThese pistons are an excellent choice for any Twin Cam build, especially those incorporating power adders like nitrous or superchargers. The robust forged construction ensures they can handle the increased cylinder pressures and temperatures. Combine these with a performance cam and a precise dyno tune to unleash the full potential of your Harley-Davidson V-twin.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB909C.010\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745152923\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 10.5:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOver Size:\u003c\/strong\u003e .010\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine Range:\u003c\/strong\u003e Twin Cam 96 to 103ci\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.6 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat components are included in this piston kit?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThis kit includes a pair of pistons, all necessary piston rings, wrist pins, and wrist pin locks for installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eAre these pistons compatible with power adders?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eYes, these pistons are manufactured from 4032 forged alloy with high silicon content, making them highly resistant to detonation and suitable for applications with power adders like nitrous or superchargers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWill I need to modify my cylinders for these pistons?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eYes, these pistons are .010 oversized, so your cylinders will require boring and honing to this specific dimension for proper fitment and optimal performance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Forged Alloy 10.5:1 .010 Over Piston Kit - Harley Twin Cam 96-103ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-forged-alloy-piston-pistons-tc96-to-103ci-10-5-9\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What components are included in this piston kit?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This kit includes a pair of pistons, all necessary piston rings, wrist pins, and wrist pin locks for installation.\"}},{\"@type\":\"Question\",\"name\":\"Are these pistons compatible with power adders?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, these pistons are manufactured from 4032 forged alloy with high silicon content, making them highly resistant to detonation and suitable for applications with power adders like nitrous or superchargers.\"}},{\"@type\":\"Question\",\"name\":\"Will I need to modify my cylinders for these pistons?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, these pistons are .010 oversized, so your cylinders will require boring and honing to this specific dimension for proper fitment and optimal performance.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035468062831,"sku":"824-01529","price":337.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_65b2ddab-cb2f-43e8-a281-6157153c75c8.png?v=1779562012"},{"product_id":"kb-pistons-forged-alloy-piston-pistons-evo-80ci-9-5-1-std-824-01606","title":"Kb Pistons Forged Alloy 9.5:1 Standard Bore Piston Kit - Harley EVO 80ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eUnlock the true potential of your Harley Evolution 80ci engine with Kb Pistons forged alloy pistons. These pistons feature a 9.5:1 compression ratio and a standard bore, providing a solid performance upgrade for your V-twin.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003e9.5:1 compression ratio for enhanced power\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eStandard bore size for easy fitment\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eForged 4032 alloy for superior crack resistance\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eCoated skirts reduce friction and wear\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eIncludes all rings, wrist pins, and locks\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor riders looking to breathe new life into their Evolution 80ci engine, this Kb Pistons forged alloy piston kit is an ideal choice. With a 9.5:1 compression ratio, these pistons offer a noticeable bump in performance over stock, translating to more responsive power delivery. The standard bore size makes them a perfect fit for engines that don't require an overbore, streamlining your engine build or refresh.\u003c\/p\u003e\u003ch3\u003eRobust Construction for Demanding Rides\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eForged from 4032 alloy with 11% silicon content for extreme durability\u003c\/li\u003e\n\u003cli\u003eDesigned to resist cracking and pre-ignition under high stress\u003c\/li\u003e\n\u003cli\u003eCoated skirts reduce friction, extending the life of the piston and cylinder walls\u003c\/li\u003e\n\u003cli\u003eIncludes all necessary rings, wrist pins, and wrist pin locks for a complete install\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003ePerformance-Ready for EVO Engines\u003c\/h3\u003e\u003cp\u003eThese pistons are not just for stock replacements; they're built to handle the demands of performance applications, including those running power adders like nitrous or superchargers. The superior crack resistance of the 4032 forged alloy ensures reliability when you push your EVO hard. For optimal performance, consider combining these pistons with a performance cam and a professional dyno tune.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB920C.STD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745155290\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 9.5:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine Size:\u003c\/strong\u003e 80 cubic inches (EVO)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 3.14 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat is included with this piston kit?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThis kit comes as a pair of pistons, complete with all necessary piston rings, wrist pins, and wrist pin locks.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eAre these pistons suitable for engines with power adders?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eYes, the 4032 forged alloy construction with 11% silicon is specifically designed to resist cracking under detonation, making them ideal for applications with nitrous or superchargers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eDo these pistons require any special installation tools?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eStandard engine building tools are typically sufficient. However, proper ring compressor and piston installation tools are recommended for a successful build.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Forged Alloy 9.5:1 Standard Bore Piston Kit - Harley EVO 80ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-forged-alloy-piston-pistons-evo-80ci-9-5-1-std-824-01606\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What is included with this piston kit?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This kit comes as a pair of pistons, complete with all necessary piston rings, wrist pins, and wrist pin locks.\"}},{\"@type\":\"Question\",\"name\":\"Are these pistons suitable for engines with power adders?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, the 4032 forged alloy construction with 11% silicon is specifically designed to resist cracking under detonation, making them ideal for applications with nitrous or superchargers.\"}},{\"@type\":\"Question\",\"name\":\"Do these pistons require any special installation tools?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Standard engine building tools are typically sufficient. However, proper ring compressor and piston installation tools are recommended for a successful build.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035468095599,"sku":"824-01606","price":313.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_34e22a0f-c28d-421f-a57f-e17052b0e408.png?v=1779561866"},{"product_id":"kb-pistons-forged-alloy-piston-pistons-evo-80ci-9-5-1-005-824-01607","title":"Kb Pistons Forged Alloy 9.5:1 .005 Over Piston Kit - Harley EVO 80ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eInject new life into your Harley Evolution 80ci engine with Kb Pistons forged alloy pistons. These pistons feature a 9.5:1 compression ratio and a .005 oversized bore, perfect for a performance refresh.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003e9.5:1 compression ratio for enhanced power\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003e.005 oversized bore for cylinder refresh\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eForged 4032 alloy for superior crack resistance\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eCoated skirts reduce friction and wear\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eIncludes all rings, wrist pins, and locks\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhen it's time to rebuild or upgrade your Evolution 80ci engine, starting with a quality piston kit is essential. This Kb Pistons forged alloy piston set offers a robust 9.5:1 compression ratio, providing a solid performance gain over stock. The .005 oversized bore allows for a minimal cylinder hone, ensuring a perfect fit and optimal ring seal without requiring a major bore job.\u003c\/p\u003e\u003ch3\u003eEngineered for Reliability Under Load\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eConstructed from 4032 forged alloy with 11% silicon for exceptional strength\u003c\/li\u003e\n\u003cli\u003eSuperior resistance to cracking and pre-ignition, even in high-stress scenarios\u003c\/li\u003e\n\u003cli\u003eCoated skirts reduce friction, promoting smoother operation and longer life\u003c\/li\u003e\n\u003cli\u003eIncludes all necessary rings, wrist pins, and wrist pin locks for a complete assembly\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eIdeal for Performance Engine Builders\u003c\/h3\u003e\u003cp\u003eThese pistons are designed to meet the demands of performance-oriented EVO builds, including those utilizing power adders like nitrous oxide or superchargers. The robust forged construction ensures they can handle the increased cylinder pressures and temperatures. For maximum performance, consider pairing these pistons with a performance camshaft, a free-flowing exhaust, and a custom dyno tune.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB920C.005\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745155306\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 9.5:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBore Size:\u003c\/strong\u003e .005 oversized\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine Displacement:\u003c\/strong\u003e EVO 80ci\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions (L x W x H):\u003c\/strong\u003e 9.5 in x 4.8 in x 4.6 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.5 lbs per pair\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat is included in this piston set?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThis set includes a pair of pistons, along with all necessary piston rings, wrist pins, and wrist pin locks for installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eAre these pistons suitable for turbocharged or supercharged engines?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eYes, the 4032 forged alloy construction with high silicon content offers superior resistance to detonation and pre-ignition, making them well-suited for engines with power adders.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWill I need to bore my cylinders for these pistons?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThese pistons are .005 oversized, meaning your cylinders will need a light bore and hone to this specific dimension for proper fitment and optimal performance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Forged Alloy 9.5:1 .005 Over Piston Kit - Harley EVO 80ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-forged-alloy-piston-pistons-evo-80ci-9-5-7\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What is included in this piston set?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This set includes a pair of pistons, along with all necessary piston rings, wrist pins, and wrist pin locks for installation.\"}},{\"@type\":\"Question\",\"name\":\"Are these pistons suitable for turbocharged or supercharged engines?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, the 4032 forged alloy construction with high silicon content offers superior resistance to detonation and pre-ignition, making them well-suited for engines with power adders.\"}},{\"@type\":\"Question\",\"name\":\"Will I need to bore my cylinders for these pistons?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"These pistons are .005 oversized, meaning your cylinders will need a light bore and hone to this specific dimension for proper fitment and optimal performance.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035468128367,"sku":"824-01607","price":313.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_479a3f37-dd49-4fb5-8304-ecea5651a7d6.png?v=1779561868"},{"product_id":"kb-pistons-forged-alloy-piston-pistons-evo-80ci-9-5-1-020-824-01609","title":"Kb Pistons Forged Alloy 9.5:1 .020 Over Piston Kit - Harley EVO 80ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eMaximize the power and durability of your Harley Evolution 80ci engine with Kb Pistons forged alloy pistons. These pistons feature a 9.5:1 compression ratio and a .020 oversized bore, ideal for a robust engine rebuild.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003e9.5:1 compression ratio for increased power output\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003e.020 oversized bore for comprehensive cylinder refresh\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eForged 4032 alloy for ultimate crack resistance\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eCoated skirts for reduced friction and extended life\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eIncludes all rings, wrist pins, and wrist pin locks\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhen undertaking a serious rebuild or performance upgrade on your Evolution 80ci engine, the foundation matters. This Kb Pistons forged alloy piston kit is designed to deliver, offering a substantial 9.5:1 compression ratio for improved power and throttle response. The .020 oversized bore provides the perfect opportunity to bore and hone your cylinders to a precise dimension, ensuring optimal ring seal and preparing your engine for high performance.\u003c\/p\u003e\u003ch3\u003eEngineered for Extreme Durability\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eCrafted from 4032 forged alloy with 11% silicon content for maximum strength\u003c\/li\u003e\n\u003cli\u003eOffers superior resistance to cracking and pre-ignition under severe operating conditions\u003c\/li\u003e\n\u003cli\u003eCoated skirts reduce friction and extend the lifespan of the piston and cylinder walls\u003c\/li\u003e\n\u003cli\u003eComes as a complete kit, including all necessary rings, wrist pins, and wrist pin locks\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eBuilt for Boost and High-Performance Builds\u003c\/h3\u003e\u003cp\u003eThese pistons are an excellent choice for any EVO 80ci build, particularly those incorporating power adders like nitrous oxide or superchargers. The robust forged construction ensures they can handle the increased cylinder pressures and temperatures associated with high-output applications. For the best results, pair these pistons with a performance cam, a quality intake, and a custom dyno tune to fully unleash your V-twin's potential.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB920C.020\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745155320\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 9.5:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBore Size:\u003c\/strong\u003e .020 over\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine:\u003c\/strong\u003e EVO 80ci\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 9.6 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 4.8 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 4.6 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.8 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat is included with this piston kit?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThis kit provides a pair of pistons, complete with all necessary piston rings, wrist pins, and wrist pin locks for installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eAre these pistons suitable for engines using power adders?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eYes, the 4032 forged alloy construction with 11% silicon content is specifically engineered to handle the added stress and heat from power adders like nitrous or superchargers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eDo my cylinders need to be bored for these pistons?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eYes, these pistons are .020 oversized, which means your cylinders will require boring and honing to this specific dimension for proper fitment and optimal performance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Forged Alloy 9.5:1 .020 Over Piston Kit - Harley EVO 80ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-forged-alloy-piston-pistons-evo-80ci-9-5-9\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What is included with this piston kit?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This kit provides a pair of pistons, complete with all necessary piston rings, wrist pins, and wrist pin locks for installation.\"}},{\"@type\":\"Question\",\"name\":\"Are these pistons suitable for engines using power adders?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, the 4032 forged alloy construction with 11% silicon content is specifically engineered to handle the added stress and heat from power adders like nitrous or superchargers.\"}},{\"@type\":\"Question\",\"name\":\"Do my cylinders need to be bored for these pistons?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, these pistons are .020 oversized, which means your cylinders will require boring and honing to this specific dimension for proper fitment and optimal performance.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035468161135,"sku":"824-01609","price":313.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_e2472b18-3b2d-42f2-b040-7f045e119c2e.png?v=1779561773"},{"product_id":"kb-pistons-forged-alloy-piston-pistons-evo-80ci-10-5-1-005-824-01613","title":"Kb Pistons Forged Alloy Piston 10.5:1 .005 Oversized - Harley Evolution 80ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eUnleash the full potential of your Evolution 80ci engine with Kb Pistons forged alloy pistons. Designed for riders pushing the limits, these pistons deliver the durability and performance needed for high-output street or race applications.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003e4032 forged alloy construction for extreme durability\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eSuperior crack resistance under detonation and pre-ignition\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eOptimized for high-compression street or race applications\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eIncludes rings, wrist pins, and wrist pin locks for complete assembly\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003e.005 oversized for precision engine rebuilding\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhen you're building an Evolution 80ci that's going to see serious power, stock pistons just won't cut it. Kb Pistons forged alloy pistons are engineered to stand up to the extreme pressures of detonation and pre-ignition, making them ideal for builds running power adders like NOS or turbo boost. This .005 oversized set with a 10.5:1 compression ratio is ready to transform your motor into a powerhouse.\u003c\/p\u003e\n\u003ch3\u003eBuilt for Boost and High Compression\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eConstructed from 4032 forged alloy with 11% silicon content\u003c\/li\u003e\n\u003cli\u003eEngineered for superior crack resistance under extreme heat and pressure\u003c\/li\u003e\n\u003cli\u003eDesigned for high-performance street or race builds with power adders\u003c\/li\u003e\n\u003cli\u003eIncludes all necessary rings, wrist pins, and wrist pin locks\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eThe Foundation for a Serious Build\u003c\/h3\u003e\n\u003cp\u003eWhether you're refreshing an EVO or chasing every last bit of power, these Kb Pistons provide a critical upgrade. Their robust construction ensures reliability when pushing higher compression ratios or introducing forced induction, giving you confidence on the street or the strip. Pair these with a performance cam and a proper dyno tune for a truly uncorked Evolution motor.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB921C.005\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745155368\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBore Size:\u003c\/strong\u003e .005 oversized\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 10.5:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine:\u003c\/strong\u003e EVO 80ci\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.5 lbs per pair\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat's included with this piston set?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eEach set includes a pair of pistons, all necessary rings, wrist pins, and wrist pin locks, providing everything you need for installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eAre these pistons suitable for boosted applications?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eYes, these pistons are specifically designed with superior crack resistance to handle the demands of power adders like NOS or turbo boost.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eDo I need to bore my cylinders for these pistons?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThese are .005 oversized pistons, so your cylinders will need to be bored and honed to the correct specification for proper fitment. Always confirm with your engine builder.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Forged Alloy Piston 10.5:1 .005 Oversized - Harley Evolution 80ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-forged-alloy-piston-pistons-evo-80ci-10-5-3\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What's included with this piston set?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Each set includes a pair of pistons, all necessary rings, wrist pins, and wrist pin locks, providing everything you need for installation.\"}},{\"@type\":\"Question\",\"name\":\"Are these pistons suitable for boosted applications?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, these pistons are specifically designed with superior crack resistance to handle the demands of power adders like NOS or turbo boost.\"}},{\"@type\":\"Question\",\"name\":\"Do I need to bore my cylinders for these pistons?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"These are .005 oversized pistons, so your cylinders will need to be bored and honed to the correct specification for proper fitment. Always confirm with your engine builder.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035468980335,"sku":"824-01613","price":313.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_19c4af2d-53c7-443b-83f0-954dcd331fc9.png?v=1779561777"},{"product_id":"kb-pistons-forged-alloy-piston-pistons-evo-80ci-10-5-1-010-824-01614","title":"Kb Pistons Forged Alloy Piston 10.5:1 .010 Oversized - Harley Evolution 80ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eMaximize the power and durability of your Evolution 80ci engine with Kb Pistons forged alloy pistons. This .010 oversized set is crafted for riders who demand robust performance in high-output street or race applications, especially when running power adders.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003eForged 4032 alloy for superior strength and heat resistance\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eEnhanced crack resistance for boosted or high-compression engines\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eComplete kit with rings, wrist pins, and locks included\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eOptimized for high-output street and race applications\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003e.010 oversized for precise cylinder boring\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBuilding a high-performance Evolution 80ci requires components that can withstand extreme conditions. Kb Pistons forged alloy pistons are engineered from 4032 forged alloy with 11% silicon content, delivering superior crack resistance under the stresses of detonation and pre-ignition. This makes them an ideal choice for serious street machines or race bikes running NOS or turbo boost.\u003c\/p\u003e\n\u003ch3\u003eEngineered for Extreme Conditions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eForged 4032 alloy with 11% silicon for enhanced durability\u003c\/li\u003e\n\u003cli\u003eDesigned to resist cracking under detonation and pre-ignition\u003c\/li\u003e\n\u003cli\u003eIdeal for high-compression, high-performance builds\u003c\/li\u003e\n\u003cli\u003eIncludes all piston rings, wrist pins, and wrist pin locks\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eThe Heart of a High-Performance EVO\u003c\/h3\u003e\n\u003cp\u003eThese .010 oversized pistons provide the foundation for a reliable, high-horsepower Evolution build. Their fully machined construction ensures consistent performance and fitment, crucial for engines operating at their peak. Combine these pistons with a performance cylinder head package and a precise tune to unlock the full potential of your Harley-Davidson V-twin.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB921C.010\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745155375\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 10.5:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBore Size:\u003c\/strong\u003e .010 oversized\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine:\u003c\/strong\u003e EVO 80ci\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 9.4 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 4.8 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 4.6 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.75 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat is included with this piston set?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThis set comes complete with a pair of pistons, all necessary piston rings, wrist pins, and wrist pin locks, ready for assembly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eAre these pistons designed for power adders?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eYes, the 4032 forged alloy construction provides superior crack resistance, making these pistons well-suited for applications using power adders like NOS or turbo boost.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWill these fit my stock Evolution cylinders?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThese are .010 oversized pistons, which means your cylinders will require boring and honing to the correct dimensions for proper installation and optimal performance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Forged Alloy Piston 10.5:1 .010 Oversized - Harley Evolution 80ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-forged-alloy-piston-pistons-evo-80ci-10-5-4\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What is included with this piston set?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This set comes complete with a pair of pistons, all necessary piston rings, wrist pins, and wrist pin locks, ready for assembly.\"}},{\"@type\":\"Question\",\"name\":\"Are these pistons designed for power adders?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, the 4032 forged alloy construction provides superior crack resistance, making these pistons well-suited for applications using power adders like NOS or turbo boost.\"}},{\"@type\":\"Question\",\"name\":\"Will these fit my stock Evolution cylinders?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"These are .010 oversized pistons, which means your cylinders will require boring and honing to the correct dimensions for proper installation and optimal performance.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035469013103,"sku":"824-01614","price":313.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_bf5a62e1-55c7-4eba-8e05-a155cdf6cc96.png?v=1779562013"},{"product_id":"kb-pistons-forged-alloy-piston-pistons-evo-80ci-10-5-1-020-824-01615","title":"Kb Pistons Forged Alloy Piston 10.5:1 .020 Oversized - Harley Evolution 80ci","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003ePower up your Evolution 80ci engine with Kb Pistons forged alloy pistons. This .020 oversized set with a 10.5:1 compression ratio is built for riders pushing the limits, offering the strength and resilience needed for high-output street or race applications.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003e4032 forged alloy with 11% silicon content\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eSuperior crack resistance under detonation or pre-ignition\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eIdeal for street and race applications with power adders\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eIncludes all rings, wrist pins, and wrist pin locks\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003e.020 oversized for engine rebuilds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor serious Evolution 80ci engine builds, especially those incorporating power adders, you need pistons that can handle the heat. Kb Pistons forged alloy pistons are crafted from 4032 forged alloy with 11% silicon content, providing exceptional crack resistance under the extreme conditions of detonation and pre-ignition. This makes them a prime choice for high-performance street and race setups running NOS or boost.\u003c\/p\u003e\n\u003ch3\u003eUncompromising Strength for High Performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eForged 4032 alloy construction for superior strength\u003c\/li\u003e\n\u003cli\u003eEnhanced crack resistance against detonation and pre-ignition\u003c\/li\u003e\n\u003cli\u003eFully machined for precise fitment and optimal performance\u003c\/li\u003e\n\u003cli\u003eIncludes all rings, wrist pins, and wrist pin locks for a complete install\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eThe Core of a Performance EVO Build\u003c\/h3\u003e\n\u003cp\u003eThese .020 oversized pistons are the ideal foundation for an Evolution 80ci engine overhaul or a new high-performance build. Their robust design ensures reliability when running higher compression or forced induction, giving you peace of mind on the road or track. Combine these with a performance cylinder head and a custom dyno tune to truly unleash your V-twin's potential.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB921C.020\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745155382\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 10.5:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverbore:\u003c\/strong\u003e .020\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine Size:\u003c\/strong\u003e EVO 80ci\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.75 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat's included in this piston set?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThis set includes a pair of forged pistons, all necessary rings, wrist pins, and wrist pin locks, providing everything required for assembly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eCan these pistons handle forced induction?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eYes, these pistons are specifically designed with superior crack resistance to perform reliably in applications utilizing power adders like NOS or turbo boost.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eDo I need to modify my cylinders for these pistons?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eAs these are .020 oversized pistons, your cylinders will need to be bored and honed to the appropriate size for a precise and correct fitment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Forged Alloy Piston 10.5:1 .020 Oversized - Harley Evolution 80ci\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-forged-alloy-piston-pistons-evo-80ci-10-5-5\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What's included in this piston set?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This set includes a pair of forged pistons, all necessary rings, wrist pins, and wrist pin locks, providing everything required for assembly.\"}},{\"@type\":\"Question\",\"name\":\"Can these pistons handle forced induction?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, these pistons are specifically designed with superior crack resistance to perform reliably in applications utilizing power adders like NOS or turbo boost.\"}},{\"@type\":\"Question\",\"name\":\"Do I need to modify my cylinders for these pistons?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"As these are .020 oversized pistons, your cylinders will need to be bored and honed to the appropriate size for a precise and correct fitment.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035469045871,"sku":"824-01615","price":313.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_34dce71e-85c2-4fe6-8bda-d02863af9b92.png?v=1779561777"},{"product_id":"kb-pistons-forged-alloy-piston-pistons-883-to-1200-10-5-1-std-824-01656","title":"Kb Pistons Forged Alloy Piston 10.5:1 Standard Bore - Harley Sportster 883 to 1200 Conversion","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eTransform your Harley Sportster 883 into a 1200cc powerhouse with Kb Pistons forged alloy pistons. This standard bore set is engineered for high-performance conversions, providing the strength and reliability needed for both street and race applications.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003eForged 4032 alloy for exceptional strength\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eDesigned for superior crack resistance in high-stress engines\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eIdeal for Sportster 883 to 1200cc conversions\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eIncludes rings, wrist pins, and wrist pin locks\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eCoated skirts for smooth operation and longevity\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhen converting your Sportster 883 to a 1200cc, a robust piston set is critical for durability and performance. Kb Pistons forged alloy pistons are made from 4032 forged alloy with 11% silicon content, offering superior crack resistance under detonation. This makes them an excellent choice for street riders and racers alike, especially those looking to add NOS or supercharger boost to their build.\u003c\/p\u003e\n\u003ch3\u003ePower and Durability for Your Sportster Conversion\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e4032 forged alloy with 11% silicon content\u003c\/li\u003e\n\u003cli\u003eSuperior crack resistance under detonation or pre-ignition\u003c\/li\u003e\n\u003cli\u003eCoated skirts for reduced friction and extended life\u003c\/li\u003e\n\u003cli\u003eIncludes rings, wrist pins, and wrist pin locks for complete assembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eUnlock Your Sportster's Potential\u003c\/h3\u003e\n\u003cp\u003eThese pistons are the core of a successful 883-to-1200cc conversion, providing the necessary compression and strength for a significant power increase. Their fully machined construction ensures a precise fit and optimal performance, whether you're cruising the streets or hitting the track. Pair these pistons with a performance cam and a proper dyno tune to fully realize the potential of your upgraded Sportster.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB925C.STD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745154347\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 10.5:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 9.5 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 4.8 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 4.6 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.5 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat's included with this piston set?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThis set includes a pair of pistons, all necessary piston rings, wrist pins, and wrist pin locks, ready for installation on your 883-to-1200cc conversion.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eAre these suitable for boosted Sportster builds?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eYes, the forged 4032 alloy construction provides superior crack resistance, making them well-suited for applications with power adders like NOS or supercharger boost.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWill these fit my Sportster 883 without cylinder modifications?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThese are standard bore pistons for an 883-to-1200cc conversion, which typically requires boring your cylinders to the 1200cc specification. Always confirm with your engine builder.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Forged Alloy Piston 10.5:1 Standard Bore - Harley Sportster 883 to 1200 Conversion\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-forged-alloy-piston-pistons-883-to-1200-10-5-1-std-824-01656\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What's included with this piston set?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This set includes a pair of pistons, all necessary piston rings, wrist pins, and wrist pin locks, ready for installation on your 883-to-1200cc conversion.\"}},{\"@type\":\"Question\",\"name\":\"Are these suitable for boosted Sportster builds?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, the forged 4032 alloy construction provides superior crack resistance, making them well-suited for applications with power adders like NOS or supercharger boost.\"}},{\"@type\":\"Question\",\"name\":\"Will these fit my Sportster 883 without cylinder modifications?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"These are standard bore pistons for an 883-to-1200cc conversion, which typically requires boring your cylinders to the 1200cc specification. Always confirm with your engine builder.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035469111407,"sku":"824-01656","price":313.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_193627cc-8413-46fb-b3f9-7def9d2f434e.png?v=1779562012"},{"product_id":"kb-pistons-forged-alloy-piston-pistons-883-to-1200-10-5-1-010-824-01658","title":"Kb Pistons Forged Alloy Piston 10.5:1 .010 Oversized - Harley Sportster 883 to 1200 Conversion","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eUpgrade your Harley Sportster 883 to a 1200cc with Kb Pistons forged alloy pistons. This .010 oversized set is engineered to deliver enhanced durability and performance, perfect for riders seeking a significant power boost.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003eForged 4032 alloy for extreme durability\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eEnhanced crack resistance against detonation and pre-ignition\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eIdeal for Sportster 883 to 1200cc conversions\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eIncludes rings, wrist pins, and wrist pin locks\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003e.010 oversized for cylinder boring\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhen undertaking an 883-to-1200cc conversion on your Sportster, choosing the right pistons is paramount for long-term reliability and power. Kb Pistons forged alloy pistons are manufactured from 4032 forged alloy with 11% silicon content, providing superior crack resistance under detonation and pre-ignition. This robust construction makes them ideal for both street and race applications, especially when incorporating power adders.\u003c\/p\u003e\n\u003ch3\u003eEngineered for High-Performance Conversions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e4032 forged alloy construction for enhanced strength\u003c\/li\u003e\n\u003cli\u003eSuperior crack resistance in high-stress engine environments\u003c\/li\u003e\n\u003cli\u003eCoated skirts reduce friction and wear for extended life\u003c\/li\u003e\n\u003cli\u003eComplete kit includes rings, wrist pins, and wrist pin locks\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eThe Foundation for a Powerful Sportster\u003c\/h3\u003e\n\u003cp\u003eThese .010 oversized pistons are designed to be the heart of a high-performance 883-to-1200cc Sportster conversion. Their precise engineering ensures consistent performance and durability, even under the demands of forced induction or aggressive riding. Pair these pistons with a performance camshaft and a precise dyno tune to unlock the full potential of your upgraded V-twin.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB925C.010\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745154361\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 10.5:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e .010 oversized\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 9.5 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 4.8 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 4.6 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.5 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat is included in this piston kit?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThis kit comes with a pair of pistons, all necessary piston rings, wrist pins, and wrist pin locks, providing a complete set for your conversion.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eAre these pistons suitable for supercharged Sportster builds?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eYes, the forged 4032 alloy with 11% silicon content offers superior crack resistance, making these pistons well-suited for applications with power adders like superchargers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eDo I need to bore my cylinders for these pistons?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eYes, these are .010 oversized pistons designed for an 883-to-1200cc conversion, which requires boring and honing your cylinders to the correct 1200cc specification.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Forged Alloy Piston 10.5:1 .010 Oversized - Harley Sportster 883 to 1200 Conversion\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-forged-alloy-piston-pistons-883-to-1200-10-5-8\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What is included in this piston kit?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This kit comes with a pair of pistons, all necessary piston rings, wrist pins, and wrist pin locks, providing a complete set for your conversion.\"}},{\"@type\":\"Question\",\"name\":\"Are these pistons suitable for supercharged Sportster builds?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, the forged 4032 alloy with 11% silicon content offers superior crack resistance, making these pistons well-suited for applications with power adders like superchargers.\"}},{\"@type\":\"Question\",\"name\":\"Do I need to bore my cylinders for these pistons?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, these are .010 oversized pistons designed for an 883-to-1200cc conversion, which requires boring and honing your cylinders to the correct 1200cc specification.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035469897839,"sku":"824-01658","price":313.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_bbecb205-383c-48c3-91da-df91720b8218.png?v=1779562017"},{"product_id":"kb-pistons-forged-alloy-piston-pistons-883-to-1200-10-5-1-020-824-01659","title":"Kb Pistons Forged Alloy Piston 10.5:1 .020 Oversized - Harley Sportster 883 to 1200 Conversion","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Kb Pistons\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eKB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eExperience a significant power upgrade on your Harley Sportster 883 with Kb Pistons forged alloy pistons for 1200cc conversions. This .020 oversized set is built for riders demanding maximum performance and reliability in their V-twin.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003e4032 forged alloy construction for extreme durability\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eEnhanced crack resistance against detonation or pre-ignition\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eIdeal for Sportster 883 to 1200cc conversions\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eIncludes all rings, wrist pins, and wrist pin locks\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003e.020 oversized for precise cylinder boring\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor an optimal 883-to-1200cc Sportster conversion, durable and high-performing pistons are essential. Kb Pistons forged alloy pistons are crafted from 4032 forged alloy with 11% silicon content, delivering superior crack resistance under detonation and pre-ignition. This makes them an excellent choice for high-output street or race applications, especially when running power adders like NOS or boost.\u003c\/p\u003e\n\u003ch3\u003eRobust Construction for Enhanced Performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eForged 4032 alloy with 11% silicon for exceptional strength\u003c\/li\u003e\n\u003cli\u003eSuperior crack resistance in high-stress engine conditions\u003c\/li\u003e\n\u003cli\u003eCoated skirts for reduced friction and extended component life\u003c\/li\u003e\n\u003cli\u003eIncludes all rings, wrist pins, and wrist pin locks for complete assembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eThe Heart of a Transformed Sportster\u003c\/h3\u003e\n\u003cp\u003eThese .020 oversized pistons provide the solid foundation for a powerful and reliable 883-to-1200cc Sportster conversion. Their fully machined construction ensures precise fitment and optimal performance, crucial for an engine operating at higher output. Pair these pistons with a performance cam and a custom dyno tune to fully unleash the potential of your upgraded Harley-Davidson Sportster.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB925C.020\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745154378\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 10.5:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOversized:\u003c\/strong\u003e .020 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 9.5 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 4.8 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 4.6 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.5 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat's included with this piston kit?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThis kit contains a pair of pistons, all necessary rings, wrist pins, and wrist pin locks, providing everything you need for the conversion.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eCan these pistons be used with power adders?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eYes, the robust 4032 forged alloy construction provides superior crack resistance, making them well-suited for applications utilizing power adders like NOS or turbo boost.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWill these pistons fit my Sportster 883 without modification?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThese are .020 oversized pistons for an 883-to-1200cc conversion, which means your cylinders will require boring and honing to the correct 1200cc specification for proper installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kb Pistons\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/kb-pistons\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kb Pistons Forged Alloy Piston 10.5:1 .020 Oversized - Harley Sportster 883 to 1200 Conversion\",\"item\":\"https:\/\/vtwinbikers.com\/products\/kb-pistons-forged-alloy-piston-pistons-883-to-1200-10-5-9\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What's included with this piston kit?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This kit contains a pair of pistons, all necessary rings, wrist pins, and wrist pin locks, providing everything you need for the conversion.\"}},{\"@type\":\"Question\",\"name\":\"Can these pistons be used with power adders?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, the robust 4032 forged alloy construction provides superior crack resistance, making them well-suited for applications utilizing power adders like NOS or turbo boost.\"}},{\"@type\":\"Question\",\"name\":\"Will these pistons fit my Sportster 883 without modification?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"These are .020 oversized pistons for an 883-to-1200cc conversion, which means your cylinders will require boring and honing to the correct 1200cc specification for proper installation.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035469963375,"sku":"824-01659","price":313.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_31cff38c-62b2-4810-b788-645a2901e050.png?v=1779565616"}],"url":"https:\/\/vtwinbikers.com\/collections\/piston-kits-and-components.oembed?page=2","provider":"Vtwinbikers","version":"1.0","type":"link"}