Cylinder Head Assembly, 6.7L Replacement For 2007-2018 Dodge Cummins 6.7L, Compatible With Dodge Ram 2500 3500 4500 Models, Complete Engine Cylinder Head Assembly Replaces 3977221, Cast Iron

Precision Fit: Direct replacement for OEM part number 3977221. The cylinder head assembly is precisely engineered to meet exact specifications, designed for the 2007-2018 Dodge Cummins 6.7L engine, compatible with Dodge Ram 2500, 3500, and 4500 models

Basic Kit: This engine cylinder head assembly includes a full set of intake and exhaust valves, valve springs, seats, and locks, providing a solid foundation for your engine rebuild. (Note: Camshaft, rocker arms, and lifters are not included.)

High-Strength Cast Iron: This complete cylinder head is built from rigid cast iron, capable of withstanding high pressure, extreme temperatures, and corrosion. It resists deformation or cracking even under frequent use, delivering long-lasting durability

Strict Quality Testing: Each cylinder head is built to match OEM parameters and undergoes rigorous factory testing, including 0.35-0.45 MPa water passage pressure and 2000 kPa valve guide sealing tests. It ensures reliable operation from the first startup