CYLINDER HEAD (ONE) CAST IRON SILVERADO/SIERRA 2500/3500 6.6L LB7

The Pacific Performance Engineering (PPE) Cast Iron Cylinder Head (MPN: 110100101) is an upgraded replacement for 2001-2004 GM 6.6L LB7 Duramax engines, engineered to mitigate common issues like head gasket failure, warping, and cracking associated with OEM aluminum heads. Constructed from high-quality alloyed grey iron, this cylinder head provides enhanced durability and heat resistance by matching the heat expansion rate of the stock cast-iron engine block. It features cast-in fuel injector cups to prevent leaks and includes a comprehensive valve train upgrade with premium 21-4N valves, stronger valve springs, and lightweight chromoly retainers for improved performance and longevity.