PPE LML Cast Iron Cylinder Head 11-16 GM 6.6L Duramax RL-66-1211 The 6R140 tuning is always

The 6R140 tuning is always active once the tune is loaded

BOSCH ADVANTAGE: The advantage to being rebuilt by Bosch is they have the ability to completely "gut" these pumps from input to output to ensure they are as close to new as possible

The HPX line connects the two heads to help balance the high pressure oil system in each head

and a product that stands up to the demands of your driving experience

IMPORTANT NOTES: Requires 2" of front bump stop extension for adequate clearance at full suspension compression

PPE LML Cast Iron Cylinder Head 11-16 GM 6.6L Duramax RL-66-1211 The 6R140 tuning is alwaysOver time, the OEM Duramax cast aluminum cylinder heads exhibit shortcomings. Due to the disparate heat expansion rates between the cast iron engine block and the cast aluminum cylinder head, issues such as head gasket scrubbing and eventual blown head gaskets arise. Additionally, the aluminum cylinder heads are susceptible to warping, melting, or cracking, particularly in high performance scenarios where elevated heat levels are introduced. PPEs new