6.7L Cummins Stage 1 Ported & Polished Cylinder Head (2007.5-2018) - Industrial Injection - PDM-67STH

Industrial Injection 6.7L Cummins Stage 1 Ported and Polished Cylinder Head with Fire Ring Grooves (2007.5-2018)
The Industrial Injection Stage 1 Ported and Polished Cylinder Head with Fire Ring Grooves is designed to maximize airflow, durability, and sealing performance for 6.7L Cummins engines. Utilizing advanced 5-axis CNC porting technology and precision hand-finishing, this cylinder head delivers improved airflow, increased performance potential, and exceptional reliability for towing, daily driving, and high-performance applications.
Each cylinder head is equipped with oversized 36mm stainless steel nitride-coated valves, premium high-temperature alloy valve seats, hardened alloy valve guides, and USA-made 95lb performance valve springs. Radius-cut fire ring grooves provide enhanced combustion sealing when used with a compatible fire ring head gasket, helping reduce the risk of head gasket failure under increased cylinder pressures.
To further improve reliability, the factory coolant freeze plugs are replaced with drilled and tapped plugs, eliminating a common failure point found in OEM cylinder heads.
Features:
CNC ported cylinder head with performance hand blending
Oversized 36mm stainless steel nitride-coated valves
Premium oversized high-temperature alloy valve seats
Diamond honed hardened alloy valve guides
Drilled and tapped coolant freeze plugs
Performance 95lb valve springs
Radius-cut fire ring grooves
Complete and ready for installation
Benefits:
Increased airflow and engine efficiency
Improved horsepower and torque potential
Enhanced combustion sealing for high-boost applications
Greater valve train stability and durability
Reduced risk of dropped valve seats and freeze plug failures
Ideal for towing, street, and competition builds
Important Note:
Fire Ring Head Gasket sold separately.