Cometic Chevrolet Mark-IV - GM Gen-V/VI Big Block V8 .060in MLS Cylinder Head Gasket - 4.310in Bore

This is a Cometic Multi-Layer Steel (MLS) cylinder head gasket, specifically sized for Chevrolet Mark-IV and GM Gen-V/VI Big Block V8 engines. It features a 4.310-inch bore and is undersized by 0.060 inches, making it suitable for aftermarket heads where customization of water ports might be needed. This gasket is designed to provide a strong seal for high-output engines, handling the demands of both aluminum and cast iron blocks and heads.

Cometic builds these gaskets with multiple layers of stainless steel for increased strength and resistance to corrosion. The outer layers are coated with Viton, a heat-resistant rubber material that can handle tough sealing environments and varying surface finishes, up to 482 degrees Fahrenheit. The center layer is stainless steel, allowing for different compressed thicknesses. Because they are MLS, these gaskets don't require any additional sealants, simplifying installation.

This gasket fits a wide range of Chevrolet and GM vehicles from the mid-60s through the early 80s, including popular models like the Impala, C10 Pickup, and Corvette. It's a well-built option for rebuilding or modifying your Big Block V8.