{"product_id":"kpmi-valve-guide-in-ex-0-001-cast-iron-hd-evolution-1987-1999-191-57004c","title":"KPMI Valve Guide - IN \/ EX +0.001 Cast Iron HD Evolution 1987-1999 — Harley-Davidson (1984-2004)","description":"\u003cp\u003eKPMI valve guide for Harley Evolution engines, cast iron construction sized at +0.001 in for intake and exhaust ports. Machined to factory specifications as a direct replacement for 1987-1999 HD V-twins.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eCast iron construction\u003c\/li\u003e\n  \u003cli\u003eFits intake and exhaust ports\u003c\/li\u003e\n  \u003cli\u003eOversized +0.001 in\u003c\/li\u003e\n  \u003cli\u003eMachined to factory specifications\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 20-4321C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Cast iron\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOversizing:\u003c\/strong\u003e +0.001 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 1.65 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.04 lbs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003eFits Harley-Davidson Evolution engines, 1987 through 1999 model years.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat does +0.001 in oversizing mean?\u003c\/h3\u003e\n\u003cp\u003eThe guide is machined 0.001 in larger than stock to accommodate rebored or worn valve stem holes, restoring proper clearance.\u003c\/p\u003e\n\u003ch3\u003eCan I use this on both intake and exhaust valves?\u003c\/h3\u003e\n\u003cp\u003eYes — this single part number fits both intake and exhaust ports on Evolution engines.\u003c\/p\u003e\n\u003ch3\u003eWill this fit my Twin Cam or Milwaukee-Eight?\u003c\/h3\u003e\n\u003cp\u003eNo — this guide is specific to Evolution engines (1987-1999). Twin Cam and M8 engines require different part numbers.\u003c\/p\u003e\n\u003ch3\u003eDo I need to hone the port after installation?\u003c\/h3\u003e\n\u003cp\u003eYes — proper installation requires reaming or honing the port to final size for correct valve stem clearance. Have a machine shop install this guide.\u003c\/p\u003e","brand":"KPMI","offers":[{"title":"Default Title","offer_id":53035006427247,"sku":"191-57004C","price":9.71,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_027e576c-536d-4825-802a-f761c133f587.png?v=1779559029","url":"https:\/\/vtwinbikers.com\/products\/kpmi-valve-guide-in-ex-0-001-cast-iron-hd-evolution-1987-1999-191-57004c","provider":"Vtwinbikers","version":"1.0","type":"link"}