{"product_id":"smeding-performance-260cc-11-cnc-ls3-cylinder-heads-pair","title":"Smeding Performance 260cc 11° CNC LS3 Cylinder Heads PAIR","description":"\u003cp\u003e\u003cstrong\u003eSmeding Performance 260cc 11° CNC 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\u003e100% Fully CNC Ported 260cc 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° Valve 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\/\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eChromoly Retainers, \u003c\/span\u003eTi Retainers, or Bare w\/ Valves\u003c\/li\u003e\n\u003cli\u003eBillet Rocker Arm Stands Included\u003cspan\u003e - Compatible w\/ OEM LS3 Rocker Arms\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003e\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 260cc 11 Degree\u003cspan\u003e \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\"\u003e136 cfm\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003e112 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\"\u003e210 cfm\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003e149 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\u003e179 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\"\u003e323 cfm\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003e198 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\"\u003e335 cfm\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003e215 cfm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e.700\"\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e360 cfm\u003c\/td\u003e\n\u003ctd\u003e224 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":45645361774790,"sku":"26011LS3","price":2295.0,"currency_code":"USD","in_stock":true},{"title":"Bare w\/ Valves \/ Yes; Machine for 1\/2\" Studs","offer_id":45645361807558,"sku":"26011LS3","price":2545.0,"currency_code":"USD","in_stock":true},{"title":"Assembled w\/ .660 Spring Kit (Steel Retainer) \/ No","offer_id":45645361840326,"sku":"26011LS3","price":2645.0,"currency_code":"USD","in_stock":true},{"title":"Assembled w\/ .660 Spring Kit (Steel Retainer) \/ Yes; Machine for 1\/2\" Studs","offer_id":45645361873094,"sku":"26011LS3","price":2895.0,"currency_code":"USD","in_stock":true},{"title":"Assembled w\/ .660 Spring Kit (Titanium Retainer) \/ No","offer_id":45645361905862,"sku":"26011LS3","price":2745.0,"currency_code":"USD","in_stock":true},{"title":"Assembled w\/ .660 Spring Kit (Titanium Retainer) \/ Yes; Machine for 1\/2\" Studs","offer_id":45645361938630,"sku":"26011LS3","price":2995.0,"currency_code":"USD","in_stock":true},{"title":"Assembled w\/ .700 Spring Kit (Titanium Retainer) \/ No","offer_id":45645361971398,"sku":"26011LS3","price":2875.0,"currency_code":"USD","in_stock":true},{"title":"Assembled w\/ .700 Spring Kit (Titanium Retainer) \/ Yes; Machine for 1\/2\" Studs","offer_id":45645362004166,"sku":"26011LS3","price":3125.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2716\/4086\/files\/smeding-performance-smeding-performance-260cc-11-cnc-ls3-cylinder-heads-pair-1228513162.png?v=1774217407","url":"https:\/\/www.glennsautoperformance.com\/products\/smeding-performance-260cc-11-cnc-ls3-cylinder-heads-pair","provider":"Glenn's Auto Performance","version":"1.0","type":"link"}