Cometic 01-06 GM 6.6L Duramax Diesel 4.100 inch Bore .045 inch MLS RHS Head Gasket

If you're working on the right side cylinder head for your GM 6.6L Duramax diesel, this Multi-Layer Steel (MLS) head gasket from Cometic is a well-built option. It's designed for engines with a 4.100 inch bore and has a compressed thickness of 0.045 inches, making it suitable for a range of Duramax applications including the LB7, LLY, LBZ, and LMM engine codes.

This gasket is constructed from multiple layers of stainless steel, which gives it increased strength and the ability to rebound, helping it resist corrosion. The outer layers are coated with Viton, a heat-resistant rubber material that can handle tough sealing environments and varying surface finishes, ensuring a reliable seal without needing additional sealants. This construction is ideal for sealing between aluminum heads and cast iron blocks, as it can manage the shearing forces that can occur between these different metals.

This gasket fits a wide variety of GM trucks and SUVs, including models like the Chevrolet Silverado 2500 HD and GMC Sierra 3500 HD from 2001 through 2016, as well as Chevrolet Express and GMC Savana vans. It's a solid choice for rebuilding or replacing cylinder heads on these popular diesel vehicles.