Cometic Chevrolet Mark-IV Big Block V8 4.630in Bore .045in MLS Cylinder Head Gasket

This is the Cometic Multi-Layer Steel (MLS) cylinder head gasket for Chevrolet Mark-IV Big Block V8 engines. You get one well-built gasket, designed to seal your combustion chambers effectively. It features a 4.630-inch bore and a compressed operating thickness of 0.045 inches, making it suitable for a wide range of Chevrolet vehicles from 1965 through 1990, including models like the Impala, C10 Pickup, and Camaro.

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 tough sealing environments and various surface finishes without needing additional sealants. This construction is ideal for engines with aluminum heads paired with either aluminum or cast iron blocks, as it can manage the shearing forces that can occur between different metals.