{"product_id":"4p-reaper-163-cnc-cylinder-head-k20-honda-2","title":"4P Reaper 163 CNC Cylinder Head K20 Honda","description":"\u003cdiv id=\"inkfrog_crosspromo_top\"\u003e\u003c\/div\u003e\n\u003clink href=\"\/\/open.inkfrog.com\/templates\/designer\/styles\/user\/164915.css\" rel=\"stylesheet\" type=\"text\/css\"\u003e\u003ch2 style=\"box-sizing: border-box; color: rgb(34, 34, 34); margin: 0px 0px 0.58824em; font-family: \" source=\"\" sans=\"\" pro sans-serif font-size:=\"\"\u003eIntroducing the \u003cspan style=\"box-sizing: border-box; color: rgb(249, 7, 7);\"\u003e4P REAPER\u003c\/span\u003e\u003cbr style=\"box-sizing: border-box;\"\u003e\n\u003c\/h2\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 20px; color: rgb(102, 102, 102); font-family: \" source=\"\" sans=\"\" pro sans-serif font-size:=\"\"\u003eMonths of development has lead to this.  In 2018 we worked tirelessly on developing a superior port for our Billet K20 cylinder head.  It is a clean slate design that could not fit into any OEM cylinder head casting, and one that outflowed anything on the market by a landslide.  Unfortunately after complaints from our competitors, our Billet head was banned from competition.  We immediately put that energy into developing a race port that has changed All Motor forever.  Even our competition runs it, copies it, benchmarks from it.  Our warpath has not only won every All Motor race competition since, but has held every record in the class since....the rampage has been so fierce that the competition all but quit.\u003cbr style=\"box-sizing: border-box;\"\u003e\u003cbr style=\"box-sizing: border-box;\"\u003e4P Race Castings allow us to put much of our billet head design into a more affordable casting that is superior in every way, and allows cooling that is suitable for the street and endurance racing.\u003cbr style=\"box-sizing: border-box;\"\u003e\u003c\/p\u003e\u003cul style=\"box-sizing: border-box; margin: 0px 0px 10px 20px; padding: 0px; list-style-position: outside; list-style-image: initial; color: rgb(102, 102, 102); font-family: \" source=\"\" sans=\"\" pro sans-serif font-size:=\"\"\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 10px;\"\u003eHigh flow intake port that outperforms top to bottom 440+ CFM.\u003cbr style=\"box-sizing: border-box;\"\u003e\n\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 10px;\"\u003eHigh flow exhaust port.\u003cbr style=\"box-sizing: border-box;\"\u003e\n\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 10px;\"\u003eBalanced combustion chamber developed after hundreds of dyno pulls on various engine combinations.\u003cbr style=\"box-sizing: border-box;\"\u003e\n\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 10px;\"\u003eNew Oversized valve seats available in steel and copper beryllium.\u003cbr style=\"box-sizing: border-box;\"\u003e\n\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 10px;\"\u003eBronze valve guides standard.\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 10px;\"\u003eNewen CNC Valve Job developed specifically for this head.\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 0px;\"\u003eRBC Style heads are shipping now, PRB Style heads ship February 2022.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2 style=\"box-sizing: border-box; color: rgb(34, 34, 34); margin: 40px 0px 0.58824em; font-family: \" source=\"\" sans=\"\" pro sans-serif font-size:=\"\"\u003eCasting Design Features\u003cbr style=\"box-sizing: border-box;\"\u003e\n\u003c\/h2\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 20px; color: rgb(102, 102, 102); font-family: \" source=\"\" sans=\"\" pro sans-serif font-size:=\"\"\u003eAs OEM castings have gone out of production, those in the field have aged and worn, and the demands on our race engines have increased, we needed to develop a superior alternative to OEM.  The 4P Race Casting is superior in every way.\u003cspan style=\"box-sizing: border-box; font-weight: 700;\"\u003e \u003cspan style=\"box-sizing: border-box; color: rgb(250, 7, 7);\"\u003eExclusively available at 4P.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cul style=\"box-sizing: border-box; margin: 0px 0px 10px 20px; padding: 0px; list-style-position: outside; list-style-image: initial; color: rgb(102, 102, 102); font-family: \" source=\"\" sans=\"\" pro sans-serif font-size:=\"\"\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 10px;\"\u003eMade IN THE USA from A356-T6 Aluminum\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 10px;\"\u003eThese \"porting castings\" give us a clean slate to put any port size and shape we choose, and offer a \"full cleanup\"\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 10px;\"\u003eWe machine a wide variety of combustion chamber shapes and sizes to suit your application.\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 10px;\"\u003ePort wall thickness is increased over OEM dramatically to allow us to run larger ports and move them around for high rpm applications.  Increased port wall thickness also allows for extreme boost applications.\u003cbr style=\"box-sizing: border-box;\"\u003e\n\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 10px;\"\u003eExtra thick deck for increased rigidity and high boost handling capabilities.\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 10px;\"\u003eSuperior cooling through 3D printed water jackets\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 10px;\"\u003eAll heads accept VTEC and non-VTEC arrangement with OEM or aftermarket components.\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 10px;\"\u003eThese race ported heads are 100% designed, machined, and finished in house at 4 Piston Racing.  We will build you the head you need for your race or street program.\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 0px;\"\u003eHeads available in PRB and RSP\/RBC Style water jacket arrangements.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cul style=\"box-sizing: border-box; margin: 0px 0px 10px 20px; padding: 0px; list-style-position: outside; list-style-image: initial; color: rgb(102, 102, 102); font-family: \" source=\"\" sans=\"\" pro sans-serif font-size:=\"\"\u003e\u003c\/ul\u003e\u003cul style=\"box-sizing: border-box; margin: 0px 0px 10px 20px; padding: 0px; list-style-position: outside; list-style-image: initial; color: rgb(102, 102, 102); font-family: \" source=\"\" sans=\"\" pro sans-serif font-size:=\"\"\u003e\u003cli style=\"box-sizing: border-box; margin-bottom: 0px;\"\u003eR40 K24Z heads available in 4 Port Exhaust Configurations to fit ANY of our Port Designs.\u003c\/li\u003e\u003c\/ul\u003e\n\n\u003cdiv id=\"inkfrog_crosspromo_bottom\"\u003e\u003c\/div\u003e\n\u003cimg src=\"https:\/\/hit.inkfrog.com\/t\/hit.gif\" style=\"max-width:100%\"\u003e","brand":"4 Piston Racing","offers":[{"title":"Default Title","offer_id":51568549724476,"sku":"EB-305707216567","price":3299.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0759\/8263\/5324\/files\/57_4473a68a-6efd-42b1-aef2-89aa69ad4c43.jpg?v=1743876962","url":"https:\/\/gcmotorsports.net\/products\/4p-reaper-163-cnc-cylinder-head-k20-honda-2","provider":"GC Motorsports ","version":"1.0","type":"link"}