{"product_id":"4298234-cummins-x15-cgi-fire-ring-cylinder-head-stage-6","title":"4298234 Cummins X15 \/ ISX15 Single Cam CGI Fire-Ring Loaded Cylinder Head – New, Stage 6 Inconel","description":"\u003cp\u003eOur top-tier \u003cstrong\u003eStage 6\u003c\/strong\u003e head for the \u003cstrong\u003eCummins X15 and ISX15 single overhead cam\u003c\/strong\u003e, built to replace Cummins \u003cstrong\u003e4298234 \/ 5658294\u003c\/strong\u003e. It combines a \u003cstrong\u003ecompacted graphite iron (CGI)\u003c\/strong\u003e casting, \u003cstrong\u003efire-ringed\u003c\/strong\u003e combustion seals and \u003cstrong\u003eInconel valves\u003c\/strong\u003e for high-horsepower, high-cylinder-pressure builds. 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 CGI (compacted graphite iron) cylinder head casting, fire-ringed\u003c\/li\u003e\n\u003cli\u003eNew intake and exhaust valves (Stage 6 — Inconel valves)\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. You will need a fire-ring head gasket — ask us and we will quote it with your head.\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 4298234, 5658294 and cross-references below\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEngine\u003c\/td\u003e\n\u003ctd\u003eCummins X15 \/ ISX15 single cam (SOHC)\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 6 — Inconel valves\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCasting\u003c\/td\u003e\n\u003ctd\u003eCGI (compacted graphite iron)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCombustion seal\u003c\/td\u003e\n\u003ctd\u003eFire-ringed — requires a fire-ring head gasket\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\u003cp\u003eAlso available: \u003ca href=\"\/products\/5658294-cummins-x15-single-cam-cylinder-head-stage-2-inconel-intake\"\u003eStage 2\u003c\/a\u003e and \u003ca href=\"\/products\/5658294-cummins-x15-single-cam-cylinder-head-stage-3-inconel-valves\"\u003eStage 3\u003c\/a\u003e X15 heads.\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003eFits Cummins X15 and ISX15 single overhead cam engines (CM871 \/ CM2250 \/ CM2350). It does not fit dual-cam ISX engines. 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 4298234, 4298235, 4298236, 4298237, 4298238, 5658294, 4386009, 3686431, 3686432, 3686434, 3686660, 3686774, 3686880, 3686881, 3687398, 3687607, 3688754, 3688755, 3688759, 3688761, 3688800, 3691250, 3691253, 4356434, 4374091, 5394197, 5394198, 5628269, 5658302, 5658309, 5708760\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 X15. 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 X15?\u003c\/h3\u003e\n\u003cp\u003eSend us your engine serial number (ESN) or the casting number from your old head. We verify fitment against 4298234 before the head ships.\u003c\/p\u003e\n\u003ch3\u003eDoes a fire-ring head need a special head gasket?\u003c\/h3\u003e\n\u003cp\u003eYes. A fire-ringed head must be paired with a matching fire-ring head gasket. It is sold separately — ask us and we will quote the correct gasket with your head.\u003c\/p\u003e\n\u003ch3\u003eWhat is a CGI cylinder head?\u003c\/h3\u003e\n\u003cp\u003eCGI is compacted graphite iron. It is stronger and more resistant to cracking from heat cycling than standard gray-iron castings, which is why it is used on high-output and high-EGT builds.\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 X15. 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 X15?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Send us your engine serial number (ESN) or the casting number from your old head. We verify fitment against 4298234 before the head ships.\"}}, {\"@type\": \"Question\", \"name\": \"Does a fire-ring head need a special head gasket?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. A fire-ringed head must be paired with a matching fire-ring head gasket. It is sold separately - ask us and we will quote the correct gasket with your head.\"}}, {\"@type\": \"Question\", \"name\": \"What is a CGI cylinder head?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"CGI is compacted graphite iron. It is stronger and more resistant to cracking from heat cycling than standard gray-iron castings, which is why it is used on high-output and high-EGT builds.\"}}, {\"@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-isx-isx15-parts\"\u003eCummins ISX \/ X15 parts\u003c\/a\u003e, \u003ca href=\"\/collections\/performance-heads\"\u003eperformance heads\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":67863857397945,"sku":"JAKS-4298234CGIFR","price":5249.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6171\/4361\/files\/4298234cgifr-1.jpg?v=1792688535","url":"https:\/\/www.jaksdiesel.com\/products\/4298234-cummins-x15-cgi-fire-ring-cylinder-head-stage-6","provider":"JAK's Diesel","version":"1.0","type":"link"}