Cylinder Heads

2010-2018 Dodge Ram 2500 & 3500 6.7L Cummins Performance Cylinder Heads & Valvetrain Components

Seal in massive cylinder pressures, eliminate thermal fatigue cracking, and bulletproof your common-rail platform against catastrophic head gasket blowouts with premium 2010–2018 6.7L Cummins 4th Gen cylinder heads from Full Force Diesel. The cylinder head on a 4th Generation Ram HD truck is subjected to extreme mechanical and thermal stress, especially when scaling up performance with electronic tuners, aggressive fueling, and upgraded turbochargers. Under heavy fifth-wheel towing or high-boost street driving, factory cylinder head castings are notorious for flexing, dropping valve seats, or lifting off the block deck. Upgrading to an engineered, heavy-duty aftermarket cylinder head provides the ultimate structural foundation needed to hold high horsepower and torque numbers securely.

Advanced Casting Integrity: Overcoming Factory Weakpoints

Aftermarket and remanufactured performance cylinder heads resolve the native metallurgical limits of the original factory casting through precision engineering:

• Thicker Decks and Reinforced Water Jackets: High-performance cylinder heads are cast with significantly thicker deck surfaces and reinforced internal casting walls. This extra material minimizes structural flexing under intense cylinder pressures and eliminates the localized stress cracks that frequently form between the valve seats on factory 4th Gen heads.

• Hardened Valve Seat Inserts: Extreme exhaust gas temperatures (EGTs) can cause factory valve seats to loosen and drop out of the head, causing catastrophic internal engine destruction. Premium replacement heads feature nickel-alloy or hardened steel valve seat inserts that are micro-pressed and locked permanently into the casting to ensure absolute valvetrain stability under high thermal loads.

Extreme Sealing Solutions: Fire-Ringing and High-Tensile Fasteners

For 4th Gen common-rail owners pushing past standard performance thresholds, standard multi-layer steel (MLS) head gaskets are rarely enough to keep the engine sealed:

• O-Ringed and Fire-Ringed Head Options: When pushing past 45 to 50 PSI of boost pressure, installing a fire-ringed or O-ringed cylinder head is critical. This machining process cuts a precise groove into the deck surface around each cylinder bore to accept a heavy-duty steel wire ring. When clamped down, this wire ring exerts immense concentrated pressure directly onto the combustion seal of the head gasket, preventing high-pressure boost and drive pressure from escaping into your cooling system.

• Mandatory High-Tensile Head Stud Upgrades: A performance cylinder head is only as good as the hardware securing it to the block. Factory torque-to-yield head bolts stretch under load, allowing the head to lift and blow the head gasket. Pairing your new cylinder head with premium, high-tensile chrome-moly head studs ensures uniform, unyielding clamping force across the entire deck profile.

At Full Force Diesel, we provide the rugged, machine-shop-certified engine components and heavy-duty hardware your 4th Gen inline-six needs to run flawlessly at any power level. Explore our complete selection of 2010–2018 6.7L Cummins 4th Gen cylinder heads, fire-ringed replacement castings, heavy-duty head stud kits, and premium multi-layer steel gaskets above to lock down your engine's top end.