{"product_id":"wiseco-black-edition-piston-kit-tc-103-cid-10-5-1-010-k2793","title":"Wiseco Black Edition 103 CID 10.5:1 +.010 Piston Kit - Harley Twin Cam","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 Wiseco\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eWiseco has forged pistons in Mentor, Ohio since 1941, supplying everything from factory race teams to big-bore street builds. Forged construction is what lets a V-twin survive higher compression and more cylinder pressure than the stock cast piston was designed for.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eMaximize the power and longevity of your Twin Cam 103 CID engine with the Wiseco Black Edition Piston Kit. This +.010 oversized kit is engineered for engines requiring a slight bore increase, delivering a robust 10.5:1 compression ratio 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;\"\u003e+.010 oversized for bore increase\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eBoosts compression to 10.5:1 for increased power\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eAdvanced Armor X and ArmorGlide coatings reduce wear and friction\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eOptimized ring design for superior oil control and sealing\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eCompatible with OEM and Screamin' Eagle cylinder heads\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese Wiseco Black Edition pistons are built for the rigors of high-performance V-twin operation. Featuring advanced Armor X and ArmorGlide coatings, they significantly reduce friction and wear while ensuring consistent oil control. The premium ring package, including a Napier second ring, is designed for superior sealing and oil management, making this kit an ideal choice for a Twin Cam rebuild or performance upgrade.\u003c\/p\u003e\u003ch3\u003eEnhanced Durability and Performance\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePremium compression ring for an ultimate combustion seal\u003c\/li\u003e\n\u003cli\u003eNapier second ring with taper face and underhook for improved oil control\u003c\/li\u003e\n\u003cli\u003e3mm oil ring design with higher tension for enhanced lubrication management\u003c\/li\u003e\n\u003cli\u003eArmor X piston coating reduces wear and extends piston life\u003c\/li\u003e\n\u003cli\u003eArmorGlide skirt coating minimizes friction and improves scuff resistance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOptimized for Oversized Twin Cam Rebuilds\u003c\/h3\u003e\u003cp\u003eWhen your Twin Cam 103 requires a slight overbore, this +.010 oversized Wiseco Black Edition piston kit is the answer. It provides the foundation for a durable, high-compression engine rebuild. The 10.5:1 compression ratio is a proven performer, offering a significant power boost. Ensure your cylinders are bored and honed to match the +.010 specification for optimal fitment and performance, and plan for a proper dyno tune to unlock its full 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 Wiseco\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e K2793\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine:\u003c\/strong\u003e Twin Cam 103 CID\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\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 2.4 lbs\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 with my stock Harley heads?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eYes, these Wiseco Black Edition pistons are designed to be compatible with both OEM Harley-Davidson and Screamin' Eagle cylinder heads.\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 oversized mean?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThe +.010 designation means these pistons are designed for cylinders that have been bored out by ten thousandths of an inch (.010\") beyond the standard size, typically done during an engine rebuild to clean up cylinder walls.\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 get my engine tuned after installing these pistons?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eYes, a dyno tune is essential after installing new pistons that change the compression ratio and bore size to ensure proper fuel mapping and ignition timing for optimal performance and engine reliability.\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\":\"Black\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Wiseco\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/wiseco\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Wiseco Black Edition 103 CID 10.5:1 +.010 Piston Kit - Harley Twin Cam\",\"item\":\"https:\/\/vtwinbikers.com\/products\/wiseco-black-edition-piston-kit-tc-103-cid-10-5-1-010-k2793\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Will these pistons work with my stock Harley heads?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, these Wiseco Black Edition pistons are designed to be compatible with both OEM Harley-Davidson and Screamin' Eagle cylinder heads.\"}},{\"@type\":\"Question\",\"name\":\"What does +.010 oversized mean?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The +.010 designation means these pistons are designed for cylinders that have been bored out by ten thousandths of an inch (.010\\\") beyond the standard size, typically done during an engine rebuild to clean up cylinder walls.\"}},{\"@type\":\"Question\",\"name\":\"Do I need to get my engine tuned after installing these pistons?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, a dyno tune is essential after installing new pistons that change the compression ratio and bore size to ensure proper fuel mapping and ignition timing for optimal performance and engine reliability.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Wiseco","offers":[{"title":"Default Title","offer_id":53035857936495,"sku":"K2793","price":576.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/1f79-5d4da6c85ea1e_1eded0b8-da07-4e88-b0ec-ff1aa4ab41bb.jpg?v=1777529784","url":"https:\/\/vtwinbikers.com\/products\/wiseco-black-edition-piston-kit-tc-103-cid-10-5-1-010-k2793","provider":"Vtwinbikers","version":"1.0","type":"link"}