Cometic Chevy BB 4.320in Bore .070 inch MLS-5 396/402/427/454 Head Gasket

Cometic Gasket is known for making well-built sealing components, and this Multi-Layer Steel (MLS) head gasket is a prime example. If you're working on a Chevrolet Mark-IV or GM Gen-V/VI Big Block V8, this gasket is designed to handle the demands of high-output engines. It's built with multiple layers of stainless steel, which gives it strength and helps it resist corrosion, while the outer layers are coated with Viton, a heat-resistant rubber material that can handle tough sealing environments and various surface finishes. This gasket fits a wide range of vehicles, including models like the 1965-1975 Chevrolet Bel Air, 1968-1980 Chevrolet C10 Suburban, and 1965-1976 Chevrolet Impala.

The multi-layer steel construction means this gasket can handle the shearing forces between aluminum heads and cast iron blocks, and it doesn't require any additional sealants to do its job. The center layer is stainless steel and can be varied in thickness to meet different requirements; in this case, it's set at .070 inches thick with a 4.320-inch bore. The Viton coating on the outer layers is rated for temperatures up to 482 degrees Fahrenheit, making it suitable for engines that run hot. These gaskets are also designed with undersized water ports on aftermarket heads, allowing for customization during installation.