PPE LML Cast Iron Cylinder Head 11-16 GM 6.6L Duramax RL-66-1211 The kit is designed for

The kit is designed for use with a Duramax model CP3 pump

for an improved driving experience with both stock size and oversize aftermarket wheels and tires

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

the best way to do this is by installing a regulated fuel return kit

PPE LML Cast Iron Cylinder Head 11-16 GM 6.6L Duramax RL-66-1211 The kit is designed forOver 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