Cometic Chevrolet Big Block 396/402/427/454 4.375in Bore .092in Thick MLS-5 Head Gasket

If you're rebuilding the top end of your Chevrolet Mark IV Big Block V8, getting the cylinder head gaskets seated right is crucial for sealing power. This Multi-Layer Steel (MLS) head gasket from Cometic is built to handle the demands of high-output engines, ensuring a solid seal between your cylinder heads and block.

Cometic uses multiple layers of stainless steel for increased strength and resistance to corrosion. The outer layers are embossed and coated with Viton, a heat-resistant rubber material that can handle extreme temperatures up to 482°F (250°C) and works well with different block and head materials, like aluminum to cast iron. This gasket has a compressed thickness of 0.092 inches and a bore size of 4.375 inches, designed to fit a range of Chevrolet Big Block engines including the 396, 402, 427, and 454. Because it's an MLS design, it doesn't require any additional sealants, making installation more straightforward.

This gasket is a well-built option for many Chevrolet vehicles from the mid-60s through the early 90s, including models like the Impala, Chevelle, and C10 Pickup. Make sure to check the full fitment list to confirm it's the right part for your specific application.