{"product_id":"smeding-performance-255cc-11-as-cast-ls3-cylinder-heads-pair","title":"Smeding Performance 255cc 11° As-Cast LS3 Cylinder Heads PAIR","description":"\u003cp\u003e\u003cstrong\u003eSmeding Performance 255cc 11° As-Cast LS3 Cylinder Heads PAIR\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e255cc Intake, 95cc Exhaust \u0026amp; 69cc Chambers\u003c\/li\u003e\n\u003cli\u003eVirgin A356 Aluminum Castings\u003c\/li\u003e\n\u003cli\u003e6 Bolt Head Casting with Extra Strength Decks\u003c\/li\u003e\n\u003cli\u003eAdvanced 11\u003cstrong\u003e°\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eValve Angle for Maximum Flow \u0026amp; PTV Clearance\u003c\/li\u003e\n\u003cli\u003e2.165” Intake Valve 21-4N Alloy \u0026amp; 1.60” Exhaust Valve 23-8N Super Alloy\u003c\/li\u003e\n\u003cli\u003e0.210\" Intake Free Drop \u0026amp; 0.250\" Exhaust Free Drop\u003c\/li\u003e\n\u003cli\u003e23-8N Alloy has the same high temp characteristics of “Inconel” w\/o the brittleness\u003c\/li\u003e\n\u003cli\u003eAvailable Complete w\/ Chromoly Steel Retainers, \u003cspan\u003eTitanium Retainers,\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eor Bare w\/ Valves\u003c\/li\u003e\n\u003cli\u003eBillet Rocker Arm Stands Included - Compatible w\/ OEM LS3 Rocker Arms\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s2\"\u003eCompatible w\/ 4 Bolt OEM Engine Blocks - 4.000\" Minimum Bore Required\u003c\/span\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"s2\"\u003ePrice is for a Pair of Cylinder Heads \u003c\/span\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e0.660\" Spring Specs:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e145# @ 1.800\"\u003cbr\u003e400# @ 1.130\"\u003cbr\u003eCB @ 1.070\"\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cstrong\u003e0.700\" Spring Specs:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e170# @ 1.800\"\u003cbr\u003e450# @ 1.115\"\u003cbr\u003eCB @ 1.000\"\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eHead Flow Data @ 28inHg, 4.125\" Bore, Intake w\/ Radius, Exhaust w\/o Pipe\u003c\/p\u003e\n\u003ctable align=\"center\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"4\"\u003e\n\u003cstrong\u003e Smeding 255cc 11 Degree\u003cspan\u003e As-Cast \u003c\/span\u003eFlow Data\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLift\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003eIntake Flow\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003eExhaust Flow\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e.200\"\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e138 cfm\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003e111 cfm\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e.300\"\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e209 cfm\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003e150 cfm\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e.400\"\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e263 cfm\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003e178 cfm\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e.500\"\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e321 cfm\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003e196 cfm\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e.600\"\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e324 cfm\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003e213 cfm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e.700\"\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e342 cfm\u003c\/td\u003e\n\u003ctd\u003e222 cfm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e","brand":"Smeding Performance","offers":[{"title":"Bare w\/ Valves \/ No","offer_id":45645363740870,"sku":"25511LS3","price":1795.0,"currency_code":"USD","in_stock":true},{"title":"Bare w\/ Valves \/ Yes; Machine for 1\/2\" Studs","offer_id":45645363773638,"sku":"25511LS3","price":2045.0,"currency_code":"USD","in_stock":true},{"title":"Assembled w\/ .660 Spring Kit (Steel Retainer) \/ No","offer_id":45645363806406,"sku":"25511LS3","price":2145.0,"currency_code":"USD","in_stock":true},{"title":"Assembled w\/ .660 Spring Kit (Steel Retainer) \/ Yes; Machine for 1\/2\" Studs","offer_id":45645363839174,"sku":"25511LS3","price":2395.0,"currency_code":"USD","in_stock":true},{"title":"Assembled w\/ .660 Spring Kit (Titanium Retainer) \/ No","offer_id":45645363871942,"sku":"25511LS3","price":2245.0,"currency_code":"USD","in_stock":true},{"title":"Assembled w\/ .660 Spring Kit (Titanium Retainer) \/ Yes; Machine for 1\/2\" Studs","offer_id":45645363904710,"sku":"25511LS3","price":2495.0,"currency_code":"USD","in_stock":true},{"title":"Assembled w\/ .700 Spring Kit (Titanium Retainer) \/ No","offer_id":45645363937478,"sku":"25511LS3","price":2375.0,"currency_code":"USD","in_stock":true},{"title":"Assembled w\/ .700 Spring Kit (Titanium Retainer) \/ Yes; Machine for 1\/2\" Studs","offer_id":45645363970246,"sku":"25511LS3","price":2625.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2716\/4086\/files\/smeding-performance-smeding-performance-255cc-11-as-cast-ls3-cylinder-heads-pair-copy-1228513161.png?v=1774217347","url":"https:\/\/www.glennsautoperformance.com\/products\/smeding-performance-255cc-11-as-cast-ls3-cylinder-heads-pair","provider":"Glenn's Auto Performance","version":"1.0","type":"link"}