Cometic GM 6.6L Duramax Diesel 01-06 4.100 inch Bore .060 inch MLS-5 Left Head Gasket

Cometic Gasket is known for making well-built sealing solutions, and this Multi-Layer Steel (MLS) head gasket is a prime example. It’s designed specifically for GM 6.6L Duramax diesel engines from 2001 to 2006, fitting a wide range of trucks like the Chevrolet Silverado 2500 HD and GMC Sierra 3500. This gasket is crucial for maintaining proper compression and preventing leaks between the cylinder head and the engine block, especially in high-output applications.

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 on both sides with Viton, a heat-resistant rubber material that can handle temperatures up to 482°F (250°C) and works well in harsh sealing environments. The center layer is stainless steel and can be varied to achieve different thicknesses, like the 0.060 inch compressed thickness on this specific gasket. Because it's an MLS gasket, it doesn't require any additional sealants and is suitable for use with both aluminum and cast iron blocks, handling the shearing forces that can occur between different metals.

This is the left-side gasket for your engine. When replacing head gaskets, it's always a good idea to inspect the cylinder heads and block surfaces for flatness and damage, and to have the necessary tools on hand for proper installation.