{"product_id":"kpmi-black-diamond-exhaust-valve-o-s-ex-valve-evo-twin-cam-1984-2004-191-17035","title":"KPMI Black Diamond Exhaust Valve - O\/S Ex. Valve EVO\/Twin CAM `1984-2004 — Harley-Davidson (1984-2017)","description":"\u003cp\u003eKPMI Black Diamond exhaust valve for Harley EVO and Twin Cam engines 1984-2004, forged stainless steel with a proprietary German impregnation process that hardens the surface to .002\" depth. Black Diamond coating reduces friction and resists corrosion and wear better than chrome or nickel plating.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eOne-piece stainless steel forging\u003c\/li\u003e\n  \u003cli\u003eBlack Diamond surface impregnation (.002\" depth)\u003c\/li\u003e\n  \u003cli\u003eReduced friction and superior wear resistance\u003c\/li\u003e\n  \u003cli\u003eOptimized flow profile\u003c\/li\u003e\n  \u003cli\u003eLightweight construction\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 KPMI\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e 20-20920\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 4.4 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 2 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 0.5 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.5 lbs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003eFits Harley-Davidson EVO and Twin Cam engines, 1984-2004 model years.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is the Black Diamond process?\u003c\/h3\u003e\n\u003cp\u003eA German impregnation process that hardens the valve surface to .002\" depth, improving wear resistance and corrosion protection beyond standard chrome or nickel plating.\u003c\/p\u003e\n\u003ch3\u003eWill this fit my 2005+ Twin Cam engine?\u003c\/h3\u003e\n\u003cp\u003eNo — this part is for EVO and Twin Cam engines through 2004. 2005-newer M8 and updated Twin Cam engines require different valve specifications.\u003c\/p\u003e\n\u003ch3\u003eIs this a complete valve assembly?\u003c\/h3\u003e\n\u003cp\u003eThis is the valve head only. You'll need to confirm your engine's full valve specification and seat compatibility before ordering.\u003c\/p\u003e\n\u003ch3\u003eHow much lighter is this than OEM valves?\u003c\/h3\u003e\n\u003cp\u003eKPMI Black Diamond valves are engineered as lightweight one-piece forgings, reducing rotating mass compared to many stock valves — exact weight savings depend on the original equipment.\u003c\/p\u003e","brand":"KPMI","offers":[{"title":"Default Title","offer_id":53036088819823,"sku":"191-17035","price":41.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_1aa9dfe7-6b75-4450-a81c-eb0f74709e53.png?v=1779564440","url":"https:\/\/vtwinbikers.com\/products\/kpmi-black-diamond-exhaust-valve-o-s-ex-valve-evo-twin-cam-1984-2004-191-17035","provider":"Vtwinbikers","version":"1.0","type":"link"}