{"product_id":"wiseco-black-edition-piston-kit-tc-103-cid-9-6-1-010-k2791","title":"Wiseco Black Edition Piston Kit - TC 103 CID 9.6:1 +.010 — Harley-Davidson (1999-2017)","description":"\u003cp\u003eWiseco Black Edition piston kit for Twin Cam 103 CID engines with 9.6:1 compression ratio and +.010 oversized bore. Forged aluminum construction with premium ring package and dual thermal coatings for durability, oil control, and reduced friction on high-performance V-twin builds.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003ePremium compression ring for ultimate ring 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 oil control\u003c\/li\u003e\n  \u003cli\u003eArmor X piston coating reduces wear\u003c\/li\u003e\n  \u003cli\u003eArmorGlide skirt coating for reduced friction and improved scuff resistance\u003c\/li\u003e\n  \u003cli\u003eCompatible with OEM and Screamin' Eagle cylinder heads\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\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 K2791\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine Size:\u003c\/strong\u003e Twin Cam 103 CID\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 9.6:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBore Size:\u003c\/strong\u003e +.010 oversized\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\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003eFits Harley-Davidson Twin Cam 103 CID engines with +.010 oversized bore requirement.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat compression ratio does this piston give me?\u003c\/h3\u003e\n\u003cp\u003e9.6:1 compression. This is a higher compression ratio suitable for performance builds and tuned fuel mapping.\u003c\/p\u003e\n\u003ch3\u003eWill this work with my stock Harley or Indian heads?\u003c\/h3\u003e\n\u003cp\u003eYes — compatible with OEM cylinder heads and Screamin' Eagle performance heads.\u003c\/p\u003e\n\u003ch3\u003eDo I need to have my cylinders bored for this kit?\u003c\/h3\u003e\n\u003cp\u003eYes. This is a +.010 oversized piston, so your cylinders must be bored .010 inches oversize by a qualified machine shop.\u003c\/p\u003e\n\u003ch3\u003eWhat coatings are on the piston and rings?\u003c\/h3\u003e\n\u003cp\u003eThe piston uses Armor X coating on the crown and ArmorGlide skirt coating to reduce wear and friction. The ring package includes premium compression and Napier second ring for superior seal and oil control.\u003c\/p\u003e\n\u003ch3\u003eCan I use this kit with stock intake and exhaust?\u003c\/h3\u003e\n\u003cp\u003ePiston compression and coatings work with stock fuel systems. For best performance, fuel mapping or a tuner is recommended with 9.6:1 compression.\u003c\/p\u003e","brand":"Wiseco","offers":[{"title":"Default Title","offer_id":53035857838191,"sku":"K2791","price":1957000.0,"currency_code":"COP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/1f79-5d4da6c85ea1e_895af827-1d7d-4ebe-9026-a33982f57742.jpg?v=1777529783","url":"https:\/\/vtwinbikers.com\/en-co\/products\/wiseco-black-edition-piston-kit-tc-103-cid-9-6-1-010-k2791","provider":"Vtwinbikers","version":"1.0","type":"link"}