{"product_id":"beg317-045","title":"Used 317 Cylinder Head #045","description":"\u003cdiv class=\"product-description used-ls-317-cylinder-head\"\u003e\n\u003ch2\u003eUsed GM LS 317 Cylinder Head, Cathedral Port\u003c\/h2\u003e\n\n\u003cp\u003eThis is a used OEM-style \u003cstrong\u003eGM LS 317 cylinder head\u003c\/strong\u003e. The 317 casting is an aluminum cathedral port LS cylinder head commonly found on 6.0L GM LS-based engines, including applications such as \u003cstrong\u003eLQ4\u003c\/strong\u003e and \u003cstrong\u003eLQ9\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003e317 heads are known for their larger combustion chambers compared to smaller 4.8L and 5.3L LS truck heads such as 706 and 862. While this makes them less popular for some naturally aspirated budget builds, the larger chamber can be useful in the right engine combination.\u003c\/p\u003e\n\n\u003cp\u003eWe like 317 heads for turbo, supercharged and pump gas LS builds where slightly lower compression can be an advantage. They can be a good match for 5.7L or 6.0L LS builds with flat top pistons, especially when the goal is to make reliable power on regular pump fuel without spending big money on aftermarket cylinder heads.\u003c\/p\u003e\n\n\u003ch3\u003eImportant Condition Information\u003c\/h3\u003e\n\n\u003cp\u003eThis is a used cylinder head and condition may vary between individual units. Some heads may be more complete, while others may be missing valves, springs, retainers, seals, bolts, plugs or other small parts.\u003c\/p\u003e\n\n\u003cp\u003eSome used heads may have cosmetic wear, dirt, oxidation, gasket residue, broken bolts, damaged threads or other defects. Please see the product pictures carefully for actual condition and included parts.\u003c\/p\u003e\n\n\u003ch3\u003eImportant Fitment Information\u003c\/h3\u003e\n\n\u003cp\u003eThis 317 cylinder head is intended for GM LS cathedral port applications. It is commonly associated with 6.0L LS engines such as LQ4 and LQ9, but may also be used in other LS-based combinations where the chamber size, valve size and cathedral port layout are suitable.\u003c\/p\u003e\n\n\u003cp\u003eAlways compare the casting number, port shape, combustion chamber style, valve size and bolt pattern with your original cylinder head before ordering.\u003c\/p\u003e\n\n\u003ch3\u003eSuitable For\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eGM LS 317 cathedral port cylinder head applications\u003c\/li\u003e\n\u003cli\u003e6.0L LS-based engines such as LQ4 and LQ9\u003c\/li\u003e\n\u003cli\u003e5.7L and 6.0L LS builds using cathedral port cylinder heads\u003c\/li\u003e\n\u003cli\u003eTurbo and supercharged LS combinations where a larger chamber is preferred\u003c\/li\u003e\n\u003cli\u003eFlat top piston LS builds where compression ratio needs to stay pump gas friendly\u003c\/li\u003e\n\u003cli\u003eStock replacement, repair work and budget performance LS builds\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eProduct Details\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e Used\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCasting number:\u003c\/strong\u003e 317\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e LS cathedral port cylinder head\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e GM 6.0L LS-based engines and compatible LS builds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCommon engine codes:\u003c\/strong\u003e LQ4, LQ9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCombustion chamber:\u003c\/strong\u003e Approx. 71cc\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntake port volume:\u003c\/strong\u003e Approx. 210cc\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExhaust port volume:\u003c\/strong\u003e Approx. 75cc\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntake valve size:\u003c\/strong\u003e 2.00 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExhaust valve size:\u003c\/strong\u003e 1.55 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e Sold each\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTypical Stock Flow Numbers\u003c\/h3\u003e\n\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eValve Lift\u003c\/th\u003e\n\u003cth\u003eIntake Flow\u003c\/th\u003e\n\u003cth\u003eExhaust Flow\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e.100\"\u003c\/td\u003e\n\u003ctd\u003e66 cfm\u003c\/td\u003e\n\u003ctd\u003e59 cfm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e.200\"\u003c\/td\u003e\n\u003ctd\u003e142 cfm\u003c\/td\u003e\n\u003ctd\u003e104 cfm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e.300\"\u003c\/td\u003e\n\u003ctd\u003e196 cfm\u003c\/td\u003e\n\u003ctd\u003e137 cfm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e.400\"\u003c\/td\u003e\n\u003ctd\u003e228 cfm\u003c\/td\u003e\n\u003ctd\u003e155 cfm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e.500\"\u003c\/td\u003e\n\u003ctd\u003e236 cfm\u003c\/td\u003e\n\u003ctd\u003e167 cfm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e.550\"\u003c\/td\u003e\n\u003ctd\u003e238 cfm\u003c\/td\u003e\n\u003ctd\u003e173 cfm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e.600\"\u003c\/td\u003e\n\u003ctd\u003e240 cfm\u003c\/td\u003e\n\u003ctd\u003e177 cfm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003eThis is a used internal engine component and may show normal signs of previous use. The cylinder head is sold as pictured, so please review all images to confirm condition, completeness and any visible defects before ordering.\u003c\/p\u003e\n\n\u003cp\u003eIf you are unsure whether this 317 cylinder head is correct for your engine, compare it with your original part before ordering or contact us for guidance.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BEG","offers":[{"title":"Default Title","offer_id":63103015977309,"sku":"BEG317-045","price":1600.0,"currency_code":"SEK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0894\/1381\/2573\/files\/DC28D377-D883-4AD6-A028-7C5F2B714F29.jpg?v=1768387682","url":"https:\/\/www.blencospeedshop.com\/products\/beg317-045","provider":"Blenco Speedshop","version":"1.0","type":"link"}