{"product_id":"cummins-isx-qsx-dohc-cylinder-head-4101420r-rebuilt-by-duffin-diesel-no-core-charge","title":"Cummins ISX\/QSX DOHC Cylinder Head 4101420R — Rebuilt by Duffin Diesel — No Core Charge","description":"\u003cp\u003e\u003cstrong\u003eCUMMINS ISX\/QSX DOHC CYLINDER HEAD 4101420R — REBUILT BY DUFFIN DIESEL\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003ePrice: $4,195\u003cbr\u003eNo core required\u003cbr\u003eFreight not included\u003c\/p\u003e\n\u003cp\u003eProfessionally rebuilt Cummins ISX\/QSX dual-overhead-cam cylinder head completed in-house by Duffin Diesel.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCasting number: 4101420R\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis is a rebuilt cast-iron cylinder head—not an uninspected used takeout or an unknown exchange head. Duffin Diesel has specialized in heavy-duty diesel engine machining since 1970.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eREBUILDING PROCESS:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e• Cylinder head completely disassembled and cleaned\u003cbr\u003e• Casting visually inspected for damage\u003cbr\u003e• Pressure tested for leaks and cracks\u003cbr\u003e• Deck surface inspected and precision resurfaced\u003cbr\u003e• Valve guides measured and serviced as required\u003cbr\u003e• Valve seats precision-machined\u003cbr\u003e• Valves inspected and serviced or replaced as required\u003cbr\u003e• Valve springs inspected\u003cbr\u003e• Valves, springs, retainers and keepers installed\u003cbr\u003e• Camshaft bores and mounting surfaces inspected\u003cbr\u003e• Final assembled-cylinder-head inspection completed\u003c\/p\u003e\n\u003cp\u003eThe cylinder head is supplied assembled with the installed valves, springs, retainers and keepers shown in the photographs.\u003c\/p\u003e\n\u003cp\u003eCamshafts, rocker assemblies, injectors, head bolts, gaskets and installation hardware are not included unless specifically stated.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAPPLICATION:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFor selected Cummins ISX and QSX 15-liter dual-cam engines, including certain CM570, CM870 and CM871 applications.\u003c\/p\u003e\n\u003cp\u003eCommon casting and replacement references may include:\u003c\/p\u003e\n\u003cp\u003e• 4101420\u003cbr\u003e• 3412277\u003cbr\u003e• 3683986\u003cbr\u003e• 4962732\u003cbr\u003e• 5413782\u003c\/p\u003e\n\u003cp\u003eFitment must be confirmed using the engine serial number and CPL before purchase. Reference numbers are provided for identification and interchange research only.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNO CORE REQUIRED:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis cylinder head is sold outright. There is no core charge, core exchange or used cylinder head that must be returned.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSHIPPING AND PURCHASE:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFreight is not included in the listed price. Call Duffin Diesel with your engine serial number, CPL and delivery ZIP code to confirm fitment, availability and freight.\u003c\/p\u003e","brand":"Duffin Diesel","offers":[{"title":"Default Title","offer_id":54552562434332,"sku":null,"price":4195.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0792\/9852\/7516\/files\/IMG_0426.jpg?v=1789060461","url":"https:\/\/duffindiesel.com\/products\/cummins-isx-qsx-dohc-cylinder-head-4101420r-rebuilt-by-duffin-diesel-no-core-charge","provider":"Duffin Diesel","version":"1.0","type":"link"}