{"product_id":"kpmi-white-diamond-exhaust-valve-m8-1-284-os-191-17047","title":"KPMI White Diamond Exhaust Valve - M8 1.284 OS — Harley-Davidson Softail Deluxe, Softail Fat Boy, Softail Fat Boy 114 (2018-2020)","description":"\u003cp\u003eKPMI White Diamond exhaust valve for Harley Milwaukee-Eight (M8) engines, sized 1.284 inches oversize for high-performance and engine rebuild applications. The White Diamond coating enhances durability and heat resistance in demanding conditions.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1.284 inch oversize diameter\u003c\/li\u003e\n  \u003cli\u003eWhite Diamond hard coating\u003c\/li\u003e\n  \u003cli\u003eDirect M8 replacement valve\u003c\/li\u003e\n  \u003cli\u003eHeat-resistant design for high-performance builds\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 20-21017H\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 1.284 inch oversize\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 3.5 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.2 lbs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003eFits Harley-Davidson Milwaukee-Eight (M8) engines. This oversize valve is for rebuilt or high-performance engine builds and is not a direct replacement for unmodified stock M8 heads.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWill this fit a stock Milwaukee-Eight engine?\u003c\/h3\u003e\n\u003cp\u003eNo — this 1.284 OS valve is for rebuilt or ported M8 heads. Stock engines use standard-size exhaust valves.\u003c\/p\u003e\n\u003ch3\u003eWhat is White Diamond coating?\u003c\/h3\u003e\n\u003cp\u003eA hard ceramic coating that resists heat and wear, improving durability in high-performance applications.\u003c\/p\u003e\n\u003ch3\u003eDo I need new valve seats installed for this oversize valve?\u003c\/h3\u003e\n\u003cp\u003eYes — oversize valves require matching oversize valve seats cut into the cylinder head by a machine shop.\u003c\/p\u003e\n\u003ch3\u003eCan I use this with my stock intake valve?\u003c\/h3\u003e\n\u003cp\u003eYou should consult your engine builder — mixing stock and oversize components requires proper flow matching for reliable performance.\u003c\/p\u003e","brand":"KPMI","offers":[{"title":"Default Title","offer_id":53035888705647,"sku":"191-17047","price":32.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/a0b5-5f0c7e3d11b7e.jpg?v=1777530060","url":"https:\/\/vtwinbikers.com\/products\/kpmi-white-diamond-exhaust-valve-m8-1-284-os-191-17047","provider":"Vtwinbikers","version":"1.0","type":"link"}