{"product_id":"afr-12-ls3-head-260cc-fully-cnc-ported-4-bolt-69cc-chambers","title":"AFR 12° LS3 Head 260cc, Fully CNC Ported, 4 BOLT, 69cc chambers","description":"\u003ch2\u003e\u003cspan\u003e\u003cstrong\u003eAFR 12° LS3 Head 260cc, Fully CNC Ported, 4 BOLT, 69cc Chambers\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eAFR’s 260cc LS3 \"Mongoose\" heads feature 100% CNC ported intake, exhaust, and chambers, utilizing advanced engineering and flow techniques to deliver the most refined Rectangle Port head available today. Constructed from A356 aluminum castings and equipped with titanium retainers and premium components, these heads are designed for high-performance applications. They support 4.000” or larger bore engines up to 454 CI, operating at up to 7000 RPM. This product is 50-state street legal for 2007-2016 emission-controlled vehicles equipped with a General Motors 6.2L LS engine. AFR heads are also available bare—contact our tech line for details.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eBasic Package Components\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e100% CNC Ported Combustion Chambers\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e100% CNC Ported Exhaust Ports\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e100% CNC Ported Intake Ports\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCompetition 5-angle Valve Job\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e8mm Bead Lock Intake Valve, 2.165\" x 5.200\" Overall Valve Length (AFR #7214)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e8mm Bead Lock Exhaust Valve, 1.600\" x 5.205\" Overall Valve Length (AFR #7212)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePAC Racing Spring 1.270\" OD Hydraulic Roller Dual Valve Spring, 155 lbs. on seat, .650\" max lift, Max RPM 7000-7200 (AFR #8019)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e7° Titanium Retainers 1.245\" O.D x .885\" I.D x .655\" I.D (AFR #8512)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e7° Bead Lock Valve Keepers (AFR #9007)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eViton Valve Seals .600\" O.D x .495\" I.D (AFR #6612)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHardened Valve Spring O.D Locator 1.380\" O.D x .570\" I.D (AFR #8042)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDuctile Iron Intake Valve Seats 2.200\" O.D x 1.750\" I.D x .375\" Deep (AFR #9060)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDuctile Iron Exhaust Valve Seats 1.650\" O.D x 1.350\" I.D x .375\" Deep (AFR #9069)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e8mm Bronze Valve Guides .502\" O.D x 2.550\" O.A.L (AFR #9053)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRocker Rail Stand (AFR #6040)\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003e260cc Large Bore Competition Flow Chart\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eTest conducted at 28\" of water (pressure) on Superflow 1020\u003c\/strong\u003e\u003cbr\u003eBore Size: 4.060\", intake 3\/4\" radius plate exhaust, 1 3\/4\" curved pipe\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cspan\u003eLift (in.)\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003e.200\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003e.300\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003e.400\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003e.500\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003e.600\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003e.650\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003e.700\u003c\/span\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eIntake\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e159\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e234\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e293\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e336\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e366\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e377\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e384\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eExhaust\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e112\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e158\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e207\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e235\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e248\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e251\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e255\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cspan\u003eSpecifications \u0026amp; Features\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eMaterial: A356 Aluminum\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIntake Port Volume: 260cc\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIntake Port Dimensions: 2.610\"H x 1.300\"W x 7\/16° Radius\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIntake Port Location: Stock\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eExhaust Port Volume: 95cc\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eExhaust Port Dimensions: 1.540\" H x 1.760\" W\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eExhaust Port Location: Stock\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCombustion Chamber Size: 69cc\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eValve Cover Bolt Pattern: Center Bolt\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eValve Angle: 12°\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Dynamic Raceworks","offers":[{"title":"Default Title","offer_id":51582914756922,"sku":"#DRW-AFR-1845","price":3490.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8647\/8650\/files\/26023.png?v=1752272080","url":"https:\/\/dynamicraceworks.com\/products\/afr-12-ls3-head-260cc-fully-cnc-ported-4-bolt-69cc-chambers","provider":"Dynamic Raceworks","version":"1.0","type":"link"}