{"product_id":"kb-pistons-hypereutectic-cast-piston-pistons-twin-cam-88ci-8-8-1-010-824-01352","title":"Kb Pistons Hypereutectic Cast Piston - Pistons Twin CAM 88ci 8.8:1 .010 — Harley-Davidson Road King, Road King Classic, Electra Glide (1999-2007)","description":"\u003cp\u003eKB Pistons Hypereutectic Cast Piston designed for Twin CAM 88ci engines at 8.8:1 compression ratio with .010 oversized bore. Cast from a 16% high-silicon alloy, these pistons deliver tight ring seal and low thermal expansion ideal for air-cooled Harley engines running pump fuel.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e16% silicon hypereutectic alloy\u003c\/li\u003e\n  \u003cli\u003eLow thermal expansion rate\u003c\/li\u003e\n  \u003cli\u003eTight piston-to-cylinder wall clearances\u003c\/li\u003e\n  \u003cli\u003eReduced engine noise and wear\u003c\/li\u003e\n  \u003cli\u003eStock to mild compression ratios up to 10.5:1\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 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\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003eFits Harley-Davidson Twin CAM 88ci air-cooled engines. Designed for stock to mild compression builds running pump fuel.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat compression ratio do these pistons support?\u003c\/h3\u003e\n\u003cp\u003eHypereutectic pistons are rated for 8.8:1 compression and up to 10.5:1 on pump fuel. Higher compression requires sintered or forged pistons.\u003c\/p\u003e\n\u003ch3\u003eAre these for .010 overbore or stock bore?\u003c\/h3\u003e\n\u003cp\u003eThese are .010 oversized pistons — your cylinders must be bored .010 over to fit correctly.\u003c\/p\u003e\n\u003ch3\u003eWhy hypereutectic instead of forged?\u003c\/h3\u003e\n\u003cp\u003eHypereutectic alloy offers tighter ring seal, quieter operation, and lower cost than forged. Forged pistons are better for high-compression racing or nitrous builds.\u003c\/p\u003e\n\u003ch3\u003eDo I need new rings and wrist pins?\u003c\/h3\u003e\n\u003cp\u003eCheck with the ring and pin supplier — KB typically requires compatible ring sets and wrist pins specific to these piston dimensions.\u003c\/p\u003e\n\u003ch3\u003eCan I run these on ethanol-blend fuel?\u003c\/h3\u003e\n\u003cp\u003eThese are designed for pump fuel (up to 10% ethanol). Verify compatibility with your fuel supplier if running higher ethanol blends.\u003c\/p\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035464130671,"sku":"824-01352","price":283.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_f618a473-4ef2-481e-b698-6039cf4a7eda.png?v=1779561994","url":"https:\/\/vtwinbikers.com\/products\/kb-pistons-hypereutectic-cast-piston-pistons-twin-cam-88ci-8-8-1-010-824-01352","provider":"Vtwinbikers","version":"1.0","type":"link"}