{"product_id":"afr-15-ls-cathedral-port-cylinder-head-205cc-fully-cnc-ported-66cc-chambers-5-7-small-bore","title":"AFR 15° LS Cathedral Port Cylinder Head 205cc Fully CNC Ported, 66cc Chambers, 5.7 Small Bore","description":"\u003ch2\u003e\u003cspan\u003e\u003cstrong\u003eAFR 15° LS Cathedral Port Cylinder Head 205cc Fully CNC Ported, 66cc Chambers, 5.7 Small Bore\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThe AFR 205cc LS1 Cylinder Head is a cost-effective upgrade over reworked factory heads, featuring fully CNC ported intake and exhaust runners along with CNC-machined combustion chambers. Designed for street, street\/strip, and towing applications, these heads are ideal for engines with displacements up to 383 cubic inches, operating at or below 6300 RPM. A minimum bore size of 3.900\" is required to accommodate the 2.020\" intake valve. Additionally, these heads are CARB-certified for use on 2005 and older emissions-controlled vehicles under EO #D-250-4.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eIncluded 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, 2.020” x 4.900\" Overall Valve Length – AFR #7207\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e8mm Bead Lock Exhaust Valve, 1.600” x 4.900\" Overall Valve Length – AFR #7228\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePAC Racing Spring 1.290\" OD Hydraulic Roller Dual Valve Spring (140 lbs seat pressure, .600\" max lift, Max RPM 6300-6500) – AFR #8017\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\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003e205cc Competition Flow Chart\u003c\/span\u003e\u003c\/h3\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.550\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003e.600\u003c\/span\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eIntake (CFM)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e147\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e214\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e249\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e284\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e296\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e301\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eExhaust (CFM)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e111\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e150\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e209\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e225\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e230\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e233\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: 205cc\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIntake Port Dimension: 3.275\"H x 1.120\"W\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eExhaust Port Volume: 84cc\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eExhaust Port Dimension: 1.415\" H x 1.710\" W\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCombustion Chamber Size: 66cc\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: 15°\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDeck Thickness: .750\"\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMinimum Bore Diameter: 3.900\"\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSpark Plug Dimensions: 14mm x .750\" w\/Tapered Seat\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCARB EO #: D-250-4\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003ePerformance \u0026amp; Compatibility\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe AFR 205cc LS1 Cylinder Heads are built for reliable performance, offering superior airflow and combustion efficiency. The fully CNC-ported design ensures maximum power output while maintaining drivability, making them a great choice for high-performance street builds, towing applications, and track use. These heads are compatible with LS1\/LS6-based applications and require a minimum bore size of 3.900\" for proper fitment.\u003c\/span\u003e\u003c\/p\u003e","brand":"Dynamic Raceworks","offers":[{"title":"Default Title","offer_id":51582993629498,"sku":"#DRW-AFR-1510","price":3057.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8647\/8650\/files\/26015.png?v=1752272302","url":"https:\/\/dynamicraceworks.com\/products\/afr-15-ls-cathedral-port-cylinder-head-205cc-fully-cnc-ported-66cc-chambers-5-7-small-bore","provider":"Dynamic Raceworks","version":"1.0","type":"link"}