{"product_id":"3965999-cummins-isb-6-7-cylinder-head-new-loaded","title":"3965999 \/ 5361595 Cummins ISB 6.7L 24-Valve Loaded Cylinder Head – New, Stage 1","description":"\u003cp\u003eNew, fully loaded cylinder head for the \u003cstrong\u003eCummins ISB 6.7L 24-valve\u003c\/strong\u003e, built to replace Cummins \u003cstrong\u003e3965999 and 5361595\u003c\/strong\u003e. Standard intake and exhaust valves for a straight stock-power replacement. It arrives assembled and ready to bolt on, with no core to send back.\u003c\/p\u003e\n\n\u003ch2\u003eWhat's Included\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eNew cylinder head casting\u003c\/li\u003e\n\u003cli\u003eNew intake and exhaust valves (Stage 1 standard intake and exhaust)\u003c\/li\u003e\n\u003cli\u003eNew valve springs, retainers and keepers\u003c\/li\u003e\n\u003cli\u003eValve guides and valve stem seals installed\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot included:\u003c\/strong\u003e head gasket set, head bolts, injectors, rocker assemblies. Ask us and we will quote the matching gasket set and bolt kit.\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eReplaces\u003c\/td\u003e\n\u003ctd\u003eCummins 3965999, 5361595 and cross-references below\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEngine\u003c\/td\u003e\n\u003ctd\u003eCummins ISB 6.7L 24-valve\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCondition\u003c\/td\u003e\n\u003ctd\u003eNew — no core\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAssembly\u003c\/td\u003e\n\u003ctd\u003eLoaded (valves, springs, retainers, keepers, guides, seals)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eValve package\u003c\/td\u003e\n\u003ctd\u003eStage 1 — standard intake and exhaust\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eJAK's Diesel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003eFits Cummins ISB 6.7L 24-valve engines that use the 3965999 \/ 5361595 head. For later engines that call for 4983298, see our \u003ca href=\"\/products\/4983298-cummins-isb-6-7-2013-cylinder-head-new-loaded\"\u003e2013+ ISB 6.7 head\u003c\/a\u003e. We confirm fitment by engine serial number (ESN) or casting number before every head ships.\u003c\/p\u003e\n\n\u003ch2\u003eReplaces \/ Cross-Reference Part Numbers\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eOEM and reman numbers:\u003c\/strong\u003e 3965999, 3965998, 5361595, 3954673, 3957384, 3957385, 3957386, 3957408, 3957958, 3957959, 3958170, 3968185, 3968186, 3969071, 3977222, 3977225, 3977226, 3977227, 3977228, 4895759, 4895765, 4931564, 4931645, 4933955, 4936081, 4955212, 4981626, 4981627, 5270036, 5282703, 5282721\u003c\/p\u003e\n\n\u003ch2\u003eShipping, Core \u0026amp; Warranty\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo core charge, no core return.\u003c\/strong\u003e This is a new casting, not an exchange unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFreight:\u003c\/strong\u003e ships crated by LTL freight. Freight is free to a commercial address with a forklift or dock. Residential, liftgate and terminal delivery can be quoted — call before you order.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLocal pickup:\u003c\/strong\u003e available in Henderson, CO by arrangement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1 year against defects in materials and workmanship.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eIs this head new or remanufactured?\u003c\/h3\u003e\n\u003cp\u003eNew. It is a new casting assembled with new valvetrain components — not a rebuilt core.\u003c\/p\u003e\n\u003ch3\u003eDo I have to send back a core?\u003c\/h3\u003e\n\u003cp\u003eNo. There is no core charge and nothing to return.\u003c\/p\u003e\n\u003ch3\u003eWhat else do I need to install it?\u003c\/h3\u003e\n\u003cp\u003ePlan on a new head gasket set and head bolts for the ISB 6.7. They are not included. Message us and we will match the right kit to your engine serial number.\u003c\/p\u003e\n\u003ch3\u003eHow do I confirm it fits my ISB 6.7?\u003c\/h3\u003e\n\u003cp\u003eSend us your engine serial number (ESN) or the casting number from your old head. We verify fitment against 3965999 before the head ships.\u003c\/p\u003e\n\u003ch3\u003e5.9 or 6.7 — how do I know which head I need?\u003c\/h3\u003e\n\u003cp\u003eSend us your engine serial number (ESN) or the casting number on your old head. ISB 5.9 and 6.7 heads look alike but are not all interchangeable.\u003c\/p\u003e\n\u003ch3\u003eHow long does delivery take?\u003c\/h3\u003e\n\u003cp\u003eHeads are crated and handed to the LTL carrier in 1–2 business days. Transit is typically 2–5 business days depending on your location.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Is this head new or remanufactured?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"New. It is a new casting assembled with new valvetrain components - not a rebuilt core.\"}}, {\"@type\": \"Question\", \"name\": \"Do I have to send back a core?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No. There is no core charge and nothing to return.\"}}, {\"@type\": \"Question\", \"name\": \"What else do I need to install it?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Plan on a new head gasket set and head bolts for the ISB 6.7. They are not included. Message us and we will match the right kit to your engine serial number.\"}}, {\"@type\": \"Question\", \"name\": \"How do I confirm it fits my ISB 6.7?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Send us your engine serial number (ESN) or the casting number from your old head. We verify fitment against 3965999 before the head ships.\"}}, {\"@type\": \"Question\", \"name\": \"5.9 or 6.7 - how do I know which head I need?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Send us your engine serial number (ESN) or the casting number on your old head. ISB 5.9 and 6.7 heads look alike but are not all interchangeable.\"}}, {\"@type\": \"Question\", \"name\": \"How long does delivery take?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Heads are crated and handed to the LTL carrier in 1-2 business days. Transit is typically 2-5 business days depending on your location.\"}}]}\u003c\/script\u003e\n\u003cp\u003eQuestions? Call JAK's Diesel at \u003ca href=\"tel:+17204456249\"\u003e(720) 445-6249\u003c\/a\u003e. See all \u003ca href=\"\/collections\/cummins-b-series-parts-isb-6bt-4bt-qsb\"\u003eCummins B-Series \/ ISB parts\u003c\/a\u003e or \u003ca href=\"\/collections\/cylinder-heads\"\u003ediesel cylinder heads\u003c\/a\u003e.\u003c\/p\u003e","brand":"JAK's Diesel","offers":[{"title":"Default Title","offer_id":67863842816185,"sku":"JAKS-3965999","price":1849.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6171\/4361\/files\/isb-1.jpg?v=1792688342","url":"https:\/\/www.jaksdiesel.com\/products\/3965999-cummins-isb-6-7-cylinder-head-new-loaded","provider":"JAK's Diesel","version":"1.0","type":"link"}