{"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","url":"https:\/\/vtwinbikers.com\/products\/kb-pistons-forged-alloy-piston-pistons-evo-80ci-9-5-1-020-824-01609","provider":"Vtwinbikers","version":"1.0","type":"link"}