2004.5-2010 GM HD Cylinder Head (One) Cast Iron - 2004.5-2010 LLY/LBZ/LMM Ported (110100113) 2025-11-13-PRICED designed to shield the top

designed to shield the top edge from scratches

helping maintain consistent damping and prevent fluid leaks

forged steering-correction components

Simplified plug-and-play architecture for efficient installation

2004.5-2010 GM HD Cylinder Head (One) Cast Iron - 2004.5-2010 LLY/LBZ/LMM Ported (110100113) 2025-11-13-PRICED designed to shield the topDescription The OEM Duramax cast aluminum cylinder heads fall short over time the different heat expansion rates between cast iron engine block and cast aluminum cylinder head cause head gasket scrubbing, and eventually blown head gaskets. The aluminum cylinder heads are also prone to warping, melting, and or cracking in high performance applications where excessive heat is introduced. PPEs new ported Cast Iron Cylinder Head is the ultimate upgrade to