Cometic Chevrolet Mark-IV - GM Gen-V/VI Big Block V8 .045in MLS Cylinder Head Gasket - 4.570in Bore

If you're rebuilding the top end of your Chevrolet Mark-IV or GM Gen-V/VI Big Block V8, getting the cylinder head gasket right is crucial for sealing combustion pressure. This Cometic Multi-Layer Steel (MLS) head gasket is built for those demanding applications, offering a compressed thickness of .045 inches and a 4.570-inch bore diameter, making it suitable for many aftermarket cylinder heads.

Cometic constructs these gaskets with multiple layers of stainless steel, which provides increased strength and resistance to corrosion. The outer layers are coated with Viton, a heat-resistant rubber material that can handle high temperatures and various sealing environments, ensuring a solid seal between your aluminum or cast iron block and aluminum heads. The center shim layer is uncoated stainless steel, allowing for precise thickness requirements. These MLS gaskets are designed to work without additional sealants, simplifying installation for many builds.

This gasket is designed for aftermarket heads and features undersized water ports, giving you the flexibility to customize them for your specific setup. It fits a wide range of vehicles, including popular models like the Chevrolet Impala, C10 Pickup, and Corvette from various years.