{"product_id":"cummins-n14-cylinder-head-3078360","title":"Cummins N14 Cylinder Head, 3078360 | Fully Loaded, New","description":"\u003ch2\u003e\u003cstrong\u003eNew Cummins N14 Fully Loaded Cylinder Head — 3078360\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThis is a \u003cstrong\u003ebrand new casting\u003c\/strong\u003e — not a dealer reman built on a fatigued core. Fully loaded, pressure-ready, and a direct bolt-on replacement for every OEM part number listed below.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eEngineered for Enhanced Performance\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e250–300 MPa tensile-strength casting\u003c\/strong\u003e — typical OEM head castings run 175–200 MPa. More strength, more resistance to cracking.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePremium cast alloy\u003c\/strong\u003e — 5% higher nickel content than OE castings to eliminate valve-seat cracking.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e15% larger cooling ports\u003c\/strong\u003e — improved heat flow keeps head temperatures stable under heavy load.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eReinforced internal ribs\u003c\/strong\u003e — added structural support reduces thermal stress and warping.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eInconel exhaust valves\u003c\/strong\u003e — withstand higher combustion temps and pressure for long service life.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eFully loaded \u0026amp; ready to install\u003c\/strong\u003e — assembled with valves, springs, keepers, rotators, seals and guides. No core return required.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eWhy Upgrade to TTM's Cylinder Head?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eAdvantage\u003c\/th\u003e\n\u003cth\u003eBenefit to You\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBetter-than-OEM casting\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLonger service life; fewer downtime-causing cracks.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStronger material — 250–300 MPa\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTypical OEM heads: 175–200 MPa. Up to 50% more tensile strength where heads crack.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDirect fit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBolt-on replacement for all listed OEM part numbers — no modifications.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCost-effective\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSave 50–70% vs. dealer remans that often reuse fatigued castings.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1-year \/ unlimited-mileage coverage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eFits Cummins \u003cstrong\u003eN14\u003c\/strong\u003e (855 cu in) applications — \u003cstrong\u003eN14 Celect\u003c\/strong\u003e and \u003cstrong\u003eN14 Celect Plus\u003c\/strong\u003e. \u003cstrong\u003eNot sure this is your head?\u003c\/strong\u003e Send us your engine serial number before you order and we will confirm fitment.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eComplete the Job\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eHead bolts on an N14 are single-use and a head swap needs a full upper gasket set. We stock both: \u003ca href=\"\/products\/3804286-131272-cummins-n14-celect-head-gasket-kit\"\u003e\u003cstrong\u003eN14 Celect Head Gasket Kit (3804286)\u003c\/strong\u003e\u003c\/a\u003e and \u003ca href=\"\/products\/4089371-cummins-n14-head-gasket-set-131264\"\u003e\u003cstrong\u003eN14 Head Gasket Set (4089371)\u003c\/strong\u003e\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eWhile You're In There\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe exhaust manifold comes off with the head — and manifold hardware heat-cycles until it seizes, stretches, or snaps. Reusing it is how a fresh head ends up with an exhaust leak. We stock the complete \u003ca href=\"\/products\/new-cummins-n14-manifold-mounting-install-kit\"\u003e\u003cstrong\u003eN14\/855 Exhaust Manifold Install Kit (181010)\u003c\/strong\u003e\u003c\/a\u003e and the \u003ca href=\"\/products\/new-cummins-n14-celect-plus-manifold-mounting-install-kit\"\u003e\u003cstrong\u003eN14 Celect Plus Manifold Install Kit (181011)\u003c\/strong\u003e\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eOEM Cross Reference Numbers\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eCummins: 3078360 | 3078380 | 3083981 | 3084058 | 3084981 | 3406738 | \u003cstrong\u003e3406742\u003c\/strong\u003e (current Cummins number) | 3406742X | 3406742RX | 3406742PX | 3411813 | 3411817\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eReading Cummins suffixes: no suffix or PX = new; RX = Cummins remanufactured exchange. Same head, different program — ours replaces any of them, and ours is brand new.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIs this head new or remanufactured?\u003c\/strong\u003e\u003cbr\u003eNew. A reman head starts as a used core that has already been through hundreds of thousands of heat cycles. This casting has zero hours on it.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I have to return my old head?\u003c\/strong\u003e\u003cbr\u003eNo. There is no core charge and no core return required.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMy Cummins quote says 3406742RX — is this the same head?\u003c\/strong\u003e\u003cbr\u003eYes. 3406742 is the current Cummins number for this head; RX on the end means their remanufactured-exchange program and PX means new. This head replaces all of them — brand new, with no core charge.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy do N14 heads crack?\u003c\/strong\u003e\u003cbr\u003eValve-seat cracking from thermal fatigue is the classic N14 failure. That is exactly why this casting runs a 250–300 MPa tensile rating (typical OEM: 175–200 MPa), 5% more nickel and 15% larger cooling ports — more fatigue resistance, lower peak temperatures.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat else should I replace while I'm in there?\u003c\/strong\u003e\u003cbr\u003eUpper gasket set and new head bolts at minimum, and new exhaust manifold mounting hardware — it wears out from heat cycling and the manifold is already off. If the engine overheated, have the deck checked before assembly.\u003c\/p\u003e","brand":"TTM Diesel","offers":[{"title":"Default Title","offer_id":44073638199508,"sku":"3078360","price":1050.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0671\/9927\/1124\/files\/3078360-01-cummins-n14-cylinder-head-loaded.jpg?v=1786339543","url":"https:\/\/ttmdiesel.com\/products\/cummins-n14-cylinder-head-3078360","provider":"TTM Diesel","version":"1.0","type":"link"}