{"product_id":"cummins-isx-x15-cylinder-head","title":"Cummins ISX\/X15 Cylinder Head","description":"\u003c!-- ===== PRODUCT TITLE ===== --\u003e\n\u003ch2 style=\"color: #f28b82; font-weight: bold; margin: 0 0 10px;\"\u003eCummins ISX SOHC Cylinder Head — Stage 1 Through Stage 6\u003c\/h2\u003e\n\u003c!-- ===== AVAILABLE FOR ===== --\u003e\n\u003cp style=\"font-weight: bold; margin: 0 0 16px;\"\u003eAvailable For: Cummins ISX (SOHC \/ Single Overhead Cam) Engines\u003c\/p\u003e\n\u003c!-- ===== INTRO ===== --\u003e\n\u003cp style=\"margin: 0 0 16px; line-height: 1.6;\"\u003eMatch the right cylinder head to your application with \u003cstrong\u003esix available stages\u003c\/strong\u003e, from an \u003cstrong\u003eeconomical fleet replacement\u003c\/strong\u003e up to a \u003cstrong\u003efire-ringed performance build\u003c\/strong\u003e. Options step up through \u003cstrong\u003eGrey Iron\u003c\/strong\u003e and \u003cstrong\u003eCompact Graphite Iron (CGI)\u003c\/strong\u003e castings, \u003cstrong\u003eInconel exhaust and intake valves\u003c\/strong\u003e, and \u003cstrong\u003estainless steel fire ring\u003c\/strong\u003e machining for a better head gasket seal. Use the chart below to compare stages and SKUs.\u003c\/p\u003e\n\u003c!-- ===== WARRANTY NOTE BOX ===== --\u003e\n\u003cdiv style=\"background: #fff3cd; border-left: 4px solid #f0c000; padding: 12px 16px; margin: 0 0 20px; line-height: 1.5;\"\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e All cylinder heads come with a 1-year warranty.\u003c\/div\u003e\n\u003c!-- ===== STAGE COMPARISON TABLE ===== --\u003e\n\u003cdiv style=\"overflow-x: auto;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 0 0 20px; font-size: 14px;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"background: #f28b82; color: #ffffff; text-align: left; padding: 10px; border: 1px solid #ddd;\"\u003eStage\u003c\/th\u003e\n\u003cth style=\"background: #f28b82; color: #ffffff; text-align: left; padding: 10px; border: 1px solid #ddd;\"\u003eSKU\u003c\/th\u003e\n\u003cth style=\"background: #f28b82; color: #ffffff; text-align: left; padding: 10px; border: 1px solid #ddd;\"\u003eCasting Material\u003c\/th\u003e\n\u003cth style=\"background: #f28b82; color: #ffffff; text-align: left; padding: 10px; border: 1px solid #ddd;\"\u003eValves\u003c\/th\u003e\n\u003cth style=\"background: #f28b82; color: #ffffff; text-align: left; padding: 10px; border: 1px solid #ddd;\"\u003eBest For\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003eStage 1\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e055843\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eGrey Iron\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eStandard Exhaust\/Intake\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eGreat economical option for a fleet.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003eStage 2\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e055599\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eGrey Iron\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eInconel Exhaust Valves\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eUpgraded exhaust valves on the exhaust side, to Inconel metal, to prevent dropping a valve.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003eStage 3\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e056043\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eCompact Graphite Iron (CGI) Casting\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eExhaust Inconel Valves\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eCGI casting is more resistant to heat and preventing cracking, with upgraded valves to Inconel metal. Inconel is more resistant to heat, to prevent dropping a valve.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003eStage 4 \u003cspan style=\"background: #1e7e34; color: #fff; font-size: 11px; padding: 2px 6px; border-radius: 3px; white-space: nowrap;\"\u003eBest Value\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e054886\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eCompact Graphite Iron (CGI) Casting\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eIntake \u0026amp; Exhaust Inconel Valves\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eCGI casting is more resistant to heat and preventing cracking, along with Inconel valves — perfect for those looking for a strong head for a performance work truck.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003eStage 5 \u003cspan style=\"background: #f28b82; color: #fff; font-size: 11px; padding: 2px 6px; border-radius: 3px; white-space: nowrap;\"\u003eFire-Ringed\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e054842\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eCompact Graphite Iron (CGI) Casting\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eExhaust Inconel Valves with Stainless Steel Fire Ring\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eSame as Stage 4, but with a fire ring on each cylinder to help better compress the head gasket for a better seal — best for high horsepower engines.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; font-weight: bold;\"\u003eStage 6 \u003cspan style=\"background: #f28b82; color: #fff; font-size: 11px; padding: 2px 6px; border-radius: 3px; white-space: nowrap;\"\u003eFire-Ringed\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e054389\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eCompact Graphite Iron (CGI) Casting\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eIntake \u0026amp; Exhaust Inconel Valves with Stainless Steel Fire Ring\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eThe strongest cylinder head we offer for working trucks — CGI, Inconel valves, and a fire ring to reduce the chance of cracking cylinder heads.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- ===== OEM CROSS-REFERENCE BLOCK: PENDING DATA (no Cummins part numbers on source chart) ===== --\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- ===== CTA FOOTER ===== --\u003e\n\u003cdiv style=\"background: #f28b82; color: #ffffff; text-align: center; padding: 18px 16px; margin: 20px 0 0; border-radius: 4px;\"\u003e\n\u003cdiv style=\"font-size: 15px; margin-bottom: 4px;\"\u003eNeed help picking the right stage for your build?\u003c\/div\u003e\n\u003cdiv style=\"font-size: 24px; font-weight: bold;\"\u003eCall Texas Truck Market — 832-867-3345\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Texas Truck Market","offers":[{"title":"STAGE 1","offer_id":43215410888765,"sku":"05584","price":3450.0,"currency_code":"USD","in_stock":true},{"title":"STAGE 2","offer_id":43215410921533,"sku":"056285","price":4300.0,"currency_code":"USD","in_stock":true},{"title":"STAGE 3","offer_id":43215410954301,"sku":"056045","price":4400.0,"currency_code":"USD","in_stock":true},{"title":"STAGE 4","offer_id":43215410987069,"sku":"055754","price":5000.0,"currency_code":"USD","in_stock":true},{"title":"STAGE 5","offer_id":43215411019837,"sku":"054842","price":5300.0,"currency_code":"USD","in_stock":true},{"title":"STAGE 6","offer_id":43215411052605,"sku":"054389","price":5800.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0551\/1626\/7581\/files\/060167E_03_XL_439c4e6b-4bbd-4227-b68a-9fc9712a7ff8.jpg?v=1771132402","url":"https:\/\/texastruckmarket.com\/products\/cummins-isx-x15-cylinder-head","provider":"Texas Truck Market","version":"1.0","type":"link"}