Cometic Chevrolet Big Block 396/402/427/454 4.375in Bore .060in Thick MLS-5 Head Gasket

When you're rebuilding or refreshing a Chevrolet Mark-IV Big Block V8, you'll want a head gasket that can handle the demands of a high-output engine. This Cometic MLS (Multi-Layer Steel) head gasket is built for that purpose. It's designed to provide maximum sealing performance without needing any additional sealants, making the installation process more straightforward.

This gasket is constructed from multiple layers of stainless steel, which gives it increased strength and resistance to corrosion. The outer layers are embossed and coated with Viton, a heat-resistant rubber material that can handle temperatures up to 482 degrees Fahrenheit. This construction is ideal for pairing aluminum heads with either aluminum or cast iron blocks, as it can withstand the shearing forces that can occur between dissimilar metals. The center shim layer is stainless steel and can be varied to achieve different thicknesses; in this case, it's set to a compressed operating thickness of 0.060 inches with a 4.375-inch bore.

This gasket fits a wide range of Chevrolet vehicles from the mid-60s through the early 90s, including models like the Impala, Chevelle, and C10 Pickup. It's a solid option for anyone looking for a well-built head gasket for their big block build.