{"product_id":"kb-pistons-hypereutectic-cast-piston-pistons-evo-80ci-8-6-1-020-824-01003","title":"Kb Pistons Hypereutectic Cast Piston - Pistons EVO 80ci 8.6:1 .020 — Harley-Davidson (1984-1999)","description":"\u003cp\u003eKB Pistons Hypereutectic Cast Piston for EVO 80ci engines at 8.6:1 compression, sized .020 over stock bore. Cast from a 16% high-silicon alloy that reduces thermal expansion and improves ring seal in 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 clearances\u003c\/li\u003e\n  \u003cli\u003eDesigned for stock to mild compression ratios up to 10.5:1\u003c\/li\u003e\n  \u003cli\u003eReduces engine noise and wear\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 KB258.020\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745060389\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 8.6:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBore Size:\u003c\/strong\u003e .020 over\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine Displacement:\u003c\/strong\u003e 80 cubic inches (EVO)\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 air-cooled EVO 80ci engines. Hypereutectic design is optimized for stock or mild compression ratios up to 10.5:1 on pump fuel.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWill these pistons work with higher compression ratios?\u003c\/h3\u003e\n\u003cp\u003eHypereutectic pistons are rated for compression ratios up to 10.5:1. Higher ratios require forged pistons designed for boost or race fuel.\u003c\/p\u003e\n\u003ch3\u003eWhat does .020 over mean?\u003c\/h3\u003e\n\u003cp\u003e.020 over means the piston is sized .020 inches larger than stock bore, requiring a .020 bore hone to fit properly.\u003c\/p\u003e\n\u003ch3\u003eWhy choose hypereutectic over forged?\u003c\/h3\u003e\n\u003cp\u003eHypereutectic pistons have lower thermal expansion, allowing tighter ring seal and quieter running in stock or mildly modified air-cooled engines on pump fuel.\u003c\/p\u003e\n\u003ch3\u003eDo these require any special installation prep?\u003c\/h3\u003e\n\u003cp\u003eEnsure your cylinders are bored and honed to the correct .020 over size. Have a machine shop measure and prepare the bore before installation.\u003c\/p\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035460264047,"sku":"824-01003","price":243.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_da90d107-dceb-40c3-aca3-3e3e631b418b.png?v=1779561824","url":"https:\/\/vtwinbikers.com\/products\/kb-pistons-hypereutectic-cast-piston-pistons-evo-80ci-8-6-1-020-824-01003","provider":"Vtwinbikers","version":"1.0","type":"link"}