{"product_id":"kb-pistons-hypereutectic-cast-piston-pistons-evo-80ci-8-6-1-010-824-01002","title":"Kb Pistons Hypereutectic Cast Piston - Pistons EVO 80ci 8.6:1 .010 — Harley-Davidson (1984-1999)","description":"\u003cp\u003eKB Pistons Hypereutectic cast piston for EVO 80ci engines at 8.6:1 compression, featuring 16% silicon content for high thermal barrier properties and low expansion. Ideal for air-cooled applications, delivering tight ring seal and reduced wear on pump fuel.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eHypereutectic alloy with 16% silicon content\u003c\/li\u003e\n  \u003cli\u003eLow thermal expansion rate\u003c\/li\u003e\n  \u003cli\u003eTight piston-to-cylinder clearances\u003c\/li\u003e\n  \u003cli\u003eSuited for stock or mild compression ratios to 10.5:1\u003c\/li\u003e\n  \u003cli\u003eDesigned for air-cooled engines\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 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\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003eFits Harley EVO 80 cubic inch air-cooled engines. Designed for stock or mildly boosted compression ratios up to 10.5:1 running on pump fuel.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat compression ratio are these pistons rated for?\u003c\/h3\u003e\n\u003cp\u003eThese hypereutectic pistons are best suited for stock or mild compression ratios up to 10.5:1 on pump fuel.\u003c\/p\u003e\n\u003ch3\u003eWhy hypereutectic over forged pistons?\u003c\/h3\u003e\n\u003cp\u003eHypereutectic alloy has 16% silicon content, giving superior thermal barrier properties and low expansion—ideal for air-cooled engines where tight ring seal reduces blow-by and wear.\u003c\/p\u003e\n\u003ch3\u003eAre these pistons OEM replacements?\u003c\/h3\u003e\n\u003cp\u003eNo — KB pistons are performance\/replacement units. Compare the part number to your engine's original specification before ordering.\u003c\/p\u003e\n\u003ch3\u003eWhat oversize is this piston?\u003c\/h3\u003e\n\u003cp\u003eThis is a .010 inch oversize piston, requiring a matching hone to your cylinder bore.\u003c\/p\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","url":"https:\/\/vtwinbikers.com\/products\/kb-pistons-hypereutectic-cast-piston-pistons-evo-80ci-8-6-1-010-824-01002","provider":"Vtwinbikers","version":"1.0","type":"link"}