{"product_id":"e-street-15-degree-cylinder-heads-for-gm-ls3-engines-with-660-lift","title":"E-Street  Gen IV Chevrolet LS3  0.660\" Maximum Lift","description":"Edelbrock introduces its new E-Street 15-degree LS3 69cc cylinder heads (PN 77618) as a premium replacement option, ensuring great power on any high-performance or stock GM LS3 engine build. These heads offer the best performance value of any aftermarket GM LS3 head. Sold in pairs and assembled with premium COMP Cams valve train components, these LS3 heads are engineered with the same architecture as the factory head, and all stock components will fit without issue. The assembled heads feature dual valve springs, chromoly steel retainers, heavy-duty stainless-steel valves, and top-quality valve seals – all inspected and assembled by qualified Edelbrock technicians. The intake valve size is 2.165 while the exhaust is 1.590 . The Beehive Valve Springs allow up to .660 lift camshafts, ideal for many mild to hot camshaft grinds. Edelbrock E-Street 15-degree LS3 cylinder heads are manufactured with premium aluminum alloy, machined to the industry's tightest tolerances. They feature manganese bronze valve guides for extended wear, with particular emphasis placed on holding precision tolerances on valve seat concentricity. This allows the valves to seal securely, eliminating any leak-down and increasing cylinder pressures during engine operation. All Edelbrock cylinder heads feature patented Clean Cast Technology(TM) , a revolutionary process that eliminates casting flaws and promotes a smoother internal surface finish for greater air and coolant flow. These benefits provide more power and increased cooling ability right out of the box. A unique dual spark-plug-pocket design allows you to use the factory-style tapered-seat spark plugs or gasket-seat spark plugs available in wider heat ranges for maximum tunability.\r\n\u003cul\u003e\t\u003cli\u003eSold in Pairs (2 complete, assembled heads per part number)\u003c\/li\u003e\r\n\t\u003cli\u003eReady to bolt on out of the box\u003c\/li\u003e\r\n\t\u003cli\u003e2.165\" Stainless Intake Valve, 1.59\" Stainless Exhaust Valve\u003c\/li\u003e\r\n\t\u003cli\u003e260cc Intake Port Volume\u003c\/li\u003e\r\n\t\u003cli\u003eGM LS3 Compatible\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003cb\u003eVehicle Specific\u003c\/b\u003e\r\n\u003cul\u003e\r\n\u003cli\u003e2009-2015 Chevrolet Camaro SS Coupe and Convertible 2008-2013 Chevrolet Corvette and Corvette Grand Sport 2008-2013 Chevrolet Corvette w\/ Optional Exhaust 2015-2017 Chevrolet SS\u003c\/li\u003e\r\n\r\n\u003c\/ul\u003e\r\n\u003ch3\u003eAttributes:\u003c\/h3\u003e\r\n\u003cp\u003e\u003c\/p\u003e\u003cul\u003e\r\n\u003cli\u003e\n\u003cb\u003eBrand Name: \u003c\/b\u003eEdelbrock\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eGTIN: \u003c\/b\u003e00085347776184\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eAssembled: \u003c\/b\u003eYes\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eCNC Machined Exhaust Port: \u003c\/b\u003eNo\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eCNC Machined Intake Port: \u003c\/b\u003eNo\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eCNC-Machined Combustion Chamber: \u003c\/b\u003eNo\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eCombustion Chamber Volume: \u003c\/b\u003e69\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eExhaust Port Location: \u003c\/b\u003eStock\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eExhaust Port Shape: \u003c\/b\u003eD-Port\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eExhaust Valve Angle: \u003c\/b\u003e15\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eExhaust Valve Job Diameter: \u003c\/b\u003e1.590\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eExhaust Valve Stem Diameter: \u003c\/b\u003e8\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eGuide Plates Included: \u003c\/b\u003eNo\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eIntake Port Location: \u003c\/b\u003eStock\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eIntake Port Shape: \u003c\/b\u003eRectangle\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eIntake Runner Volume: \u003c\/b\u003e260\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eIntake Valve Angle: \u003c\/b\u003e15\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eIntake Valve Job Diameter: \u003c\/b\u003e2.165\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eIntake Valve Stem Diameter: \u003c\/b\u003e8\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eMaterial: \u003c\/b\u003eAluminum\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eQuantity: \u003c\/b\u003eSold in Pairs\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eRetainer Diameter: \u003c\/b\u003e1.030\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eRetainer Lock Style: \u003c\/b\u003e7\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eRetainer Material: \u003c\/b\u003eSteel\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eRocker Arm Nuts Included: \u003c\/b\u003eNo\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eSpark Plug Style: \u003c\/b\u003e14mm x 5\/8 hex .750\" reach\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eSteam Holes Drilled: \u003c\/b\u003eNo\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eValve Cover Mounting Style: \u003c\/b\u003eCenter bolt LS3 compatible\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eValve Guide Material: \u003c\/b\u003eManganese Bronze\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eValve Guide Size I.D.: \u003c\/b\u003e8\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eValve Guide Size O.D.: \u003c\/b\u003e.502\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eValve Lock Material: \u003c\/b\u003eTool Steel\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eValve Lock Style: \u003c\/b\u003e7\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eValve Seat Material: \u003c\/b\u003eDuctile Iron\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eValve Spring Diameter: \u003c\/b\u003e1.282\" \/ 1.077\"\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eValve Spring Maximum Lift: \u003c\/b\u003e.660\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eValve Spring Type: \u003c\/b\u003eBeehive\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003ch3\u003eExtended Information:\u003c\/h3\u003e\r\n\u003cp\u003e\u003c\/p\u003e\u003cul\u003e\r\n\u003cli\u003e\n\u003cb\u003eCountry of Origin: \u003c\/b\u003eCN\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eEmissions : \u003c\/b\u003eRacing or Pre-Emissions Use Only\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003ch3\u003ePacking Information:\u003c\/h3\u003e\r\n\u003cp\u003e\u003c\/p\u003e\u003cul\u003e\r\n\u003cli\u003e\n\u003cb\u003eQuantity of Each: \u003c\/b\u003e2\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003ePackage UOM: \u003c\/b\u003eEA\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eDimension: \u003c\/b\u003e24.5 x 12 x 9 inches\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eWeight: \u003c\/b\u003e56 POUNDS\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003cdiv id=\"sema-product-fitment\" class=\"product__accordion accordion fitment\"\u003e\u003c\/div\u003e","brand":"Edelbrock","offers":[{"title":"Default Title","offer_id":44336482680877,"sku":"BDVJ-77618","price":3131.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0646\/2780\/2157\/files\/77618_ls_cylinder_head.jpg?v=1762923056","url":"https:\/\/montgomeryparts.com\/products\/e-street-15-degree-cylinder-heads-for-gm-ls3-engines-with-660-lift","provider":"Montgomery Parts","version":"1.0","type":"link"}