Cometic Chevrolet BB 111.125mm Bore .040in MLS 396/402/427/454 Head Gasket

When you're rebuilding the top end of a Chevrolet Big Block engine, getting the head gasket seal right is crucial for performance and reliability. This Cometic Multi-Layer Steel (MLS) head gasket is built to handle the demands of high-output V8s, ensuring a solid seal between your cylinder head and block.

Cometic uses multiple layers of stainless steel for increased strength and resistance to corrosion, which also helps the gasket rebound effectively. The outer layers are coated with Viton, a heat-resistant rubber material that can handle tough sealing environments and various surface finishes. This gasket has a compressed thickness of .040 inches and a bore size of 4.375 inches, making it suitable for engines like the 396, 402, 427, and 454. Because it's an MLS design, it doesn't require any additional sealants, simplifying installation.

This gasket is a good choice for applications using aluminum heads with either aluminum or cast iron blocks, as the multi-layer steel construction can manage the shearing forces that can occur between dissimilar metals. It's designed to fit a wide range of Chevrolet vehicles from the mid-60s through the early 90s, including models like the Impala, Chevelle, and C10 pickup.