Cometic GM Gen I Small Block V8 4.060in Bore .060in MLS-5 Head Gasket

This is a Cometic Multi-Layer Steel (MLS) head gasket, specifically designed for GM Gen I Small Block V8 engines. It features a 4.060-inch bore and a compressed thickness of 0.060 inches, making it suitable for a wide range of applications including many Chevrolet and GMC trucks and cars from the early to mid-1980s, as well as some Buick models and Avanti II vehicles.

Cometic builds these MLS gaskets using multiple layers of stainless steel for increased strength and resistance to corrosion. The outer layers are coated with Viton, a heat-resistant rubber material that can handle demanding sealing environments and various surface finishes without needing additional sealants. This construction is ideal for sealing between aluminum heads and either aluminum or cast iron blocks, as it can manage the shearing forces that can occur between dissimilar metals. The center layer is stainless steel and can be varied to achieve different thickness requirements, like the 0.060-inch thickness on this particular gasket.