{"product_id":"beg823-019","title":"Used 823 Cylinder Head #019","description":"\u003cdiv class=\"product-description used-ls-823-cylinder-head\"\u003e\n\u003ch2\u003eUsed GM LS 823 Cylinder Head, Rectangular Port\u003c\/h2\u003e\n\n\u003cp\u003eThis is a used OEM-style \u003cstrong\u003eGM LS 823 cylinder head\u003c\/strong\u003e. The 823 casting is a rectangular port LS cylinder head commonly found on later Gen IV 6.0L and 6.2L LS-based engines, including applications such as \u003cstrong\u003eLS3, L92, L99, L76, L77, LY6, L96, L94\u003c\/strong\u003e and \u003cstrong\u003eL9H\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003e823 heads are one of the most popular factory rectangular port LS heads. They offer significantly better airflow than earlier cathedral port truck heads such as 706, 862, 241 and 317, making them a strong option for performance LS builds.\u003c\/p\u003e\n\n\u003cp\u003eThese heads work especially well on 6.0L and 6.2L LS combinations where the larger rectangular intake port, larger valves and strong factory airflow can be used properly. They are commonly used in naturally aspirated, cammed, turbo and supercharged LS builds where a high-flowing OEM GM casting is preferred over 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 823 cylinder head is intended for GM LS rectangular port applications. It is commonly associated with LS3, L92 and similar Gen IV LS engines.\u003c\/p\u003e\n\n\u003cp\u003eRectangular port LS heads use matching rectangular port intake manifolds and the correct LS3\/L92-style rocker arm setup. They are not a direct match for cathedral port intake manifolds.\u003c\/p\u003e\n\n\u003cp\u003eThese heads are generally best suited for engines with a 4.00 inch bore or larger. Always compare the casting number, port shape, combustion chamber style, valve size, intake manifold style and rocker arm setup with your original engine before ordering.\u003c\/p\u003e\n\n\u003ch3\u003eSuitable For\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eGM LS 823 rectangular port cylinder head applications\u003c\/li\u003e\n\u003cli\u003eLS3, L92, L99, L76, L77, LY6, L96, L94, L9H and similar LS engines\u003c\/li\u003e\n\u003cli\u003e6.0L and 6.2L LS-based performance builds\u003c\/li\u003e\n\u003cli\u003eNaturally aspirated, turbo and supercharged LS combinations\u003c\/li\u003e\n\u003cli\u003eCammed street engines and high airflow LS builds\u003c\/li\u003e\n\u003cli\u003eStock replacement, repair work and performance LS upgrades\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 823\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e LS rectangular port cylinder head\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e GM Gen IV LS-based engines with rectangular port cylinder heads\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCommon engine applications:\u003c\/strong\u003e LS3, L92, L99, L76, L77, LY6, L96, L94, L9H\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCombustion chamber:\u003c\/strong\u003e Approx. 70cc\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntake port volume:\u003c\/strong\u003e Approx. 257-280cc depending on source and casting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExhaust port volume:\u003c\/strong\u003e Approx. 87-93cc depending on source and casting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntake valve size:\u003c\/strong\u003e 2.165 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExhaust valve size:\u003c\/strong\u003e 1.590 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePort style:\u003c\/strong\u003e Rectangular intake port\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\u003e75 cfm\u003c\/td\u003e\n\u003ctd\u003e50 cfm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e.200\"\u003c\/td\u003e\n\u003ctd\u003e163 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\u003e233 cfm\u003c\/td\u003e\n\u003ctd\u003e145 cfm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e.400\"\u003c\/td\u003e\n\u003ctd\u003e277 cfm\u003c\/td\u003e\n\u003ctd\u003e179 cfm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e.500\"\u003c\/td\u003e\n\u003ctd\u003e317 cfm\u003c\/td\u003e\n\u003ctd\u003e190 cfm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e.600\"\u003c\/td\u003e\n\u003ctd\u003e326 cfm\u003c\/td\u003e\n\u003ctd\u003e202 cfm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e.700\"\u003c\/td\u003e\n\u003ctd\u003e324 cfm\u003c\/td\u003e\n\u003ctd\u003e206 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 823 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":63096370168157,"sku":"BEG823-019","price":2000.0,"currency_code":"SEK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0894\/1381\/2573\/files\/78312BD2-B247-4565-A5D2-4B786330E57C.jpg?v=1768474499","url":"https:\/\/www.blencospeedshop.com\/products\/beg823-019","provider":"Blenco Speedshop","version":"1.0","type":"link"}