Cometic Chevy Small Block 4.200 inch Bore .089 inch MLS-5 Head Gasket (w/All Steam Holes)

If you're rebuilding the top end of your Chevy Gen 1 Small Block V8, a good head gasket is crucial for sealing combustion pressure and coolant. This Multi-Layer Steel (MLS) gasket from Cometic is built for high-output engines and is designed to handle the demands of both aluminum and cast iron blocks, even when paired with aluminum heads. It's a well-built option that doesn't require any additional sealants, making installation more straightforward.

Cometic uses multiple layers of stainless steel for strength and corrosion resistance, with the outer layers coated in Viton, a heat-resistant rubber material that can handle temperatures up to 482°F. This construction helps prevent leaks and ensures a consistent seal across different surface finishes. The compressed thickness is 0.089 inches, and this particular gasket includes all steam holes, which are important for managing heat in the engine block.

This gasket fits a wide range of GM Gen 1 Small Block V8 applications, including many Chevrolet and GMC trucks and cars from the early 1980s. Make sure to check the fitment data to confirm it's the right choice for your specific vehicle.