12 Valve Cummins cylinder head replacement Competition or street ready and is a performance upgrade Cylinder head. The intake ports offers the most velocity of any port we have offered yet. This translates to reduced turbo lag and lower exhaust gas temps. Even a stock truck will see an improvement. A thicker deck and casting is used to reduce heat warping. Making it more resistant to cracking compared to a factory style cylinder head. The factory style intake shelf offers more flow to cylinder 1 and 6. This is compared to a factory casting by reducing restrictions in the ports, essentially providing the same thing a side draft intake does.
This Cylinder Head can be machined to accept fire rings and O-rings.
1.75? intake valves
For a larger valve or higher flow, take a look at our stage 2 head.
Loaded with Hamilton 165 Beehive springs, retainers and locks, Valves and valve seats.