{"title":"LS1 Heads","description":"","products":[{"product_id":"f110-247cc-ls1-2-6-cathedral-cylinder-head-set","title":"F110 247cc LS1\/2\/6 Cathedral Cylinder Head (SET)","description":"\u003cp\u003eThe Most Advanced Cathedral Port Cylinder Head for 364-427 c.i. LS Engines Utilizing a sub-.650” Lift Camshaft.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eRaised intake and exhaust ports for superior efficiency.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eUnmatched flow characteristics in a 10 degree valve angle and shallow chamber.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFED Custom billet aluminum rocker stands included (Must use OEM LS7 style rockers).\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eCHE Bronze Valve Guides\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFED Prime Grade – Black Nitride Coated Stainless Steel Intake Valve 2.100″ and Exhaust Valve 1.615″\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Spring Kits: \u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eHydraulic-Roller – FED .700″ Lift Dual Valve Springs with Ti Retainers\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSolid-Roller – PAC-1228 .900″ Lift Dual Valve Springs with Ti Retainers\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFED F-Series Valve Covers with Billet Oil Fill Cap\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"woocommerce-Tabs-panel woocommerce-Tabs-panel--description panel entry-content wc-tab\" id=\"tab-description\" role=\"tabpanel\" aria-labelledby=\"tab-title-description\" style=\"display: block;\"\u003e\n\u003ch2 class=\"yikes-custom-woo-tab-title yikes-custom-woo-tab-title-description\"\u003eDescription\u003c\/h2\u003e\n\u003cp\u003eF-Series is Frankenstein’s master creation for maximum horsepower, designed to endure and thrive in severe performance racing applications. Every detail of the F-Series is configured to achieve a stable, efficient and enduring system that removes limits imposed by traditional racing cylinder heads designs.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eF-Series Cylinder Heads:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRaised runner design on intake and exhaust ports allow cylinders to fill efficiently at high-rpm without altering low and mid-range performance.\u003c\/li\u003e\n\u003cli\u003eExhaust to valve port exit is on-center with valves for unmatched flow characteristics in a shallow combustion chamber and 10° valve angle.\u003c\/li\u003e\n\u003cli\u003eHigh-efficiency water jacket.  Optimally reduced water jacket for strength, efficiency and optimal cooling capability for all applications, even endurance racing.\u003c\/li\u003e\n\u003cli\u003e0.750” deck structure. thicker than all stock and most aftermarket castings.\u003c\/li\u003e\n\u003cli\u003eExtended intake flange accepts all standard manifolds without modification.\u003c\/li\u003e\n\u003cli\u003e LS7 bolt pattern accommodates standard header designs using 2” or larger headers.\u003c\/li\u003e\n\u003cli\u003eProprietary modified A356-T6  aluminum casting. We modify the mag, iron, and silica levels to accommodate for the high level of stress on the alloy. This allows us to maintain proper hardness while still having elasticity to flex a small amount under load.\u003c\/li\u003e\n\u003cli\u003e100% designed, tooled, cast, and machined in the USA.\u003c\/li\u003e\n\u003cli\u003eDry deck or solid castings available for an additional fee. (Call for details.)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eF-Series Valve Covers Included:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eValve cover design inspired by the SB2 pattern, clears shaft mount rockers and springs with larger diameter\/higher lift packages.\u003c\/li\u003e\n\u003cli\u003eValve covers are dowelled and o-ringed for superior sealing and serviceability. (See the valve cover section for additional information.)\u003c\/li\u003e\n\u003cli\u003e-6orb water crossover ports allow for better cooling capacity and more flexible installation\/plumbing options.\u003c\/li\u003e\n\u003cli\u003e-16AN ORB Oil Fill cap included.\u003c\/li\u003e\n\u003cli\u003e319 aluminum alloy cast valve covers – the alloy used in most aftermarket and stock cylinder head castings.\u003c\/li\u003e\n\u003cli\u003eIncludes a baffled vent section, compatible with stock PCV\/emissions components.\u003c\/li\u003e\n\u003cli\u003eAvailable with or without built-in coil mounts. (Coil-mounted accepts LS2 \u0026amp; LS3 coils only.)\u003c\/li\u003e\n\u003cli\u003eAvailable finishes: raw cast, gloss green or wrinkle black powder-coated.\u003c\/li\u003e\n\u003cli\u003eOptional F-Series billet valve covers and related \u003ca href=\"https:\/\/frankensteined.net\/product-category\/accessories\/\"\u003eaccessories\u003c\/a\u003e available.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSolid Roller Options:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eJesel shaft mounted rockers are available with purchase of all F-Series solid roller cylinder heads.\u003c\/li\u003e\n\u003cli\u003eDesigned for on-center lifters.\u003c\/li\u003e\n\u003cli\u003eSolid roller heads will accommodate up to a ½” pushrod.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Frankenstein Engine Dynamics","offers":[{"title":"Default Title","offer_id":46261430223101,"sku":"116014","price":4999.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0754\/7489\/5101\/files\/F110-Fake.png?v=1747681970"},{"product_id":"f110-265cc-ls1-2-6-cathedral-cylinder-head-set","title":"F110 265cc LS1\/2\/6 Cathedral Cylinder Head (SET)","description":"\u003cdiv class=\"woocommerce-product-details__short-description\"\u003e\n\u003cp\u003eThe Most Extreme Cathedral Port Cylinder Head for 388-427 c.i. LS Engines.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eRaised intake and exhaust ports for superior efficiency.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eUnmatched flow characteristics in a 10 degree valve angle and shallow chamber.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eCHE Bronze Valve Guides\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFED Prime Grade – Black Nitride Coated Stainless Steel Intake Valve 2.135″ and Exhaust Valve 1.615″\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Spring Kits: \u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eHydraulic-Roller – FED .700″ Lift Dual Valve Springs with Ti Retainers\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSolid-Roller – PAC-1228 .900″ Lift Dual Valve Springs with Ti Retainers\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFED F-Series Valve Covers with Billet Oil Fill Cap\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSold Per Set\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"woocommerce-Tabs-panel woocommerce-Tabs-panel--description panel entry-content wc-tab\" id=\"tab-description\" role=\"tabpanel\" aria-labelledby=\"tab-title-description\" style=\"display: block;\"\u003e\n\u003ch2 class=\"yikes-custom-woo-tab-title yikes-custom-woo-tab-title-description\"\u003eDescription\u003c\/h2\u003e\n\u003cp\u003eF-Series is Frankenstein’s master creation for maximum horsepower, designed to endure and thrive in severe performance racing applications. Every detail of the F-Series is configured to achieve a stable, efficient and enduring system that removes limits imposed by traditional racing cylinder heads designs.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eF-Series Cylinder Heads:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRaised runner design on intake and exhaust ports allow cylinders to fill efficiently at high-rpm without altering low and mid-range performance.\u003c\/li\u003e\n\u003cli\u003eExhaust to valve port exit is on-center with valves for unmatched flow characteristics in a shallow combustion chamber and 10° valve angle.\u003c\/li\u003e\n\u003cli\u003eHigh-efficiency water jacket.  Optimally reduced water jacket for strength, efficiency and optimal cooling capability for all applications, even endurance racing.\u003c\/li\u003e\n\u003cli\u003e0.750” deck structure. thicker than all stock and most aftermarket castings.\u003c\/li\u003e\n\u003cli\u003eExtended intake flange accepts all standard manifolds without modification.\u003c\/li\u003e\n\u003cli\u003e LS7 bolt pattern accommodates standard header designs using 2” or larger headers.\u003c\/li\u003e\n\u003cli\u003eProprietary modified A356-T6  aluminum casting. We modify the mag, iron, and silica levels to accommodate for the high level of stress on the alloy. This allows us to maintain proper hardness while still having elasticity to flex a small amount under load.\u003c\/li\u003e\n\u003cli\u003e100% designed, tooled, cast, and machined in the USA.\u003c\/li\u003e\n\u003cli\u003eDry deck or solid castings available for an additional fee. (Call for details.)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eF-Series Valve Covers Included:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eValve cover design inspired by the SB2 pattern, clears shaft mount rockers and springs with larger diameter\/higher lift packages.\u003c\/li\u003e\n\u003cli\u003eValve covers are dowelled and o-ringed for superior sealing and serviceability. (See the valve cover section for additional information.)\u003c\/li\u003e\n\u003cli\u003e-6orb water crossover ports allow for better cooling capacity and more flexible installation\/plumbing options.\u003c\/li\u003e\n\u003cli\u003e-16AN ORB Oil Fill cap included.\u003c\/li\u003e\n\u003cli\u003e319 aluminum alloy cast valve covers – the alloy used in most aftermarket and stock cylinder head castings.\u003c\/li\u003e\n\u003cli\u003eIncludes a baffled vent section, compatible with stock PCV\/emissions components.\u003c\/li\u003e\n\u003cli\u003eAvailable with or without built-in coil mounts. (Coil-mounted accepts LS2 \u0026amp; LS3 coils only.)\u003c\/li\u003e\n\u003cli\u003eAvailable finishes: raw cast, gloss green or wrinkle black powder-coated.\u003c\/li\u003e\n\u003cli\u003eOptional F-Series billet valve covers and related \u003ca href=\"https:\/\/frankensteined.net\/product-category\/accessories\/\"\u003eaccessories\u003c\/a\u003e available.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSolid Roller Options:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eJesel shaft mounted rockers are available with purchase of all F-Series solid roller cylinder heads.\u003c\/li\u003e\n\u003cli\u003eDesigned for on-center lifters.\u003c\/li\u003e\n\u003cli\u003eSolid roller heads will accommodate up to a ½” pushrod.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Frankenstein Engine Dynamics","offers":[{"title":"Default Title","offer_id":46261430255869,"sku":"116042","price":4999.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0754\/7489\/5101\/files\/F110265_BARE_EXH.png?v=1747682014"},{"product_id":"m115","title":"M115 6-Bolt Cathedral Port Cylinder Head (Set)","description":"\u003ch3\u003e\u003cstrong\u003e\u003cspan style=\"text-decoration: underline;\"\u003eAll cylinder heads are built to order. Current lead time is approximately 4-6 weeks for completion.  Check \"Ready To Ship\" Tab for what we have in stock.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch3\u003esmall bore BIG power\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e3.780″ Bore Minimum\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFully CNC ported, 64cc chamber volume\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e225 or 240cc intake port, 96cc exhaust port and 15° valve angle\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e0.625 Deck Thickness\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eHigh Quality Components:\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFED Stainless Steel Severe Duty Valves\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eCustom PAC .700″ Lift Valve Springs\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eTitanium Retainers\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eNote: Chamber width requires 4.030 bore gasket minimum\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSold Per SET\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe Monster Series is the first threshold into HP creation far beyond any OEM head.\u003c\/p\u003e\n\u003cp\u003eFrankenstein introduced another level of horsepower when The Monster was brought to life. FED poured our arsenal of precision engineering into a common cylinder head and woke the industry. Intake and exhaust chambers are 5-Axis CNC ported with our latest high performance program, meticulously hand blended and deburred. Our strict quality control processes ensure extreme attention to detail and precise tolerances. High quality components include FED’s premier stainless steel severe duty valves, custom PAC .700” lift valve springs, titanium retainers.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e1\/2\" Head Studs NOT available\u003c\/p\u003e","brand":"Frankenstein Engine Dynamics","offers":[{"title":"Default Title","offer_id":46689015267581,"sku":null,"price":3300.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0754\/7489\/5101\/files\/M115-1.png?v=1759502222"}],"url":"https:\/\/frankensteined.net\/collections\/ls1-heads.oembed","provider":"Frankenstein Engine Dynamics","version":"1.0","type":"link"}