Cometic GM 6.6L Duramax Diesel 01-06 4.100 inch Bore .075 inch MLS-5 Left Head Gasket

If you're rebuilding the top end of your GM 6.6L Duramax diesel, specifically the LB7, LLY, LBZ, LMM, LGH, or LML engines, a reliable head gasket is crucial. This Cometic Multi-Layer Steel (MLS) gasket is designed for the left side of the engine and features a 4.100-inch bore with a compressed thickness of 0.075 inches, making it a solid choice for these powerful diesel applications.

Cometic builds these gaskets with multiple layers of stainless steel, which gives them strength and the ability to rebound, helping to resist corrosion. The outer layers are coated with Viton, a heat-resistant rubber material that can handle tough sealing environments and various surface finishes, ensuring a good seal whether you have aluminum heads on an aluminum block or cast iron block. The center layer is stainless steel and can be varied to achieve different thicknesses, like the 0.075 inches found here, which is ideal for many rebuilds.

This gasket fits a wide range of Chevrolet and GMC trucks and SUVs from 2001 through 2016, including models like the Silverado 2500 HD, Sierra 3500 HD, and Chevrolet Express vans. Because these are MLS gaskets, they don't require any additional sealants, simplifying the installation process.