Cylinder Heads
Duramax 6.6L LMM Cylinder heads are cast-aluminum units designed for strength, heat resistance, and efficient airflow. They house the intake and exhaust valves, fuel injectors, and glow plugs, and are key to combustion efficiency and power output. The LMM heads are similar to LBZ versions but feature slight refinements to support emissions upgrades like the DPF system. Cracks, warping, or valve issues can develop over time, especially under high stress. Performance and remanufactured heads are available for those seeking durability, improved flow, or power gains in tuned or rebuilt engines.
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LMM Daily Driver Cylinder Head Reman
Price range: $1,000.00 through $1,400.00-
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LMM Workhorse Cylinder Head Reman
Price range: $1,299.00 through $1,699.00-
Select options This product has multiple variants. The options may be chosen on the product page -
LMM Workhorse Plus Cylinder Head Reman
Price range: $1,699.00 through $2,099.00-
Select options This product has multiple variants. The options may be chosen on the product page