Cometic 01-06 GM 6.6L Duramax 4.100in Bore .040in MLS Head Gasket - Left

If you're rebuilding the top end of your GM 6.6L Duramax, getting the head gaskets right is crucial for sealing combustion pressure and coolant. This Cometic Multi-Layer Steel (MLS) head gasket is specifically designed for the left side of engines with a 4.100-inch bore and a compressed thickness of 0.040 inches.

Cometic builds these gaskets with multiple layers of stainless steel, which gives them increased 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 conditions and various surface finishes. This construction means the gasket seals well against both aluminum and cast iron blocks, and it doesn't require any additional sealants for installation, making the job a bit simpler. The center layer is stainless steel and can be varied in thickness to meet different requirements, like the 0.040-inch spec on this particular gasket.

This gasket fits a wide range of GM trucks and SUVs, including models like the Chevrolet Silverado 2500 HD and GMC Sierra 3500 HD. It's a solid option for high-output engines where reliable sealing is a top priority.