Cometic GM LB7/LLY/LBZ/LMM/LGH/LML Duramax .066in MLS Cylinder Head Gasket - 4.100in Bore - LHS

This Cometic Multi-Layer Steel (MLS) head gasket is built with multiple embossed layers of stainless steel, featuring a Viton rubber coating on the outer layers. This construction is specifically designed to handle the demands of high-output GM Duramax engines, including models like the LB7, LLY, LBZ, LMM, LGH, and LML. The gasket has a compressed operating thickness of 0.066 inches and a 4.100-inch bore, making it suitable for the left-hand side of the engine.

MLS gaskets are known for their strength and ability to rebound, which helps them resist corrosion and withstand the shearing forces that can occur between aluminum and cast iron engine blocks. The Viton coating on the outer layers is heat resistant up to 482°F (250°C), providing a robust seal in harsh operating conditions. Because of their advanced construction, these gaskets do not require any additional sealants, simplifying the installation process.

This gasket fits a wide range of GM trucks and SUVs, including Chevrolet Silverado and GMC Sierra 2500 HD and 3500 models from the early 2000s through 2016, as well as Chevrolet Express and GMC Savana vans. It's a solid option when rebuilding the top end of your Duramax engine.