ProMaxx Performance Cylinder Heads are designed as replacement cylinder heads with thicker castings in crack prone areas. Sold as a complete cylinder head with valves, valve seals, springs, retainers, and locks. These new castings are sold without a core charge and come ready to install.
- New Casting
- Improved Casting In "Problem Areas"
- No Core Charge!
Fits casting numbers #3977225 - #3977221
Fits: 2007.5-2015 Dodge 6.7L Cummins (#3977225 - #3977221)