Cometic Chevrolet Mark-IV - GM Gen-V/VI Big Block V8 .086in MLS Cylinder Head Gasket - 4.630in 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 gaskets right is crucial for sealing combustion and coolant passages. This Multi-Layer Steel (MLS) gasket from Cometic is built for serious performance, offering a robust seal that stands up to high-output engines.

Cometic uses multiple layers of stainless steel for increased strength and corrosion resistance. The outer layers are coated with Viton, a heat-resistant rubber material that handles tough sealing environments and varying surface finishes, making it suitable for both aluminum and cast iron blocks. With a compressed thickness of 0.086 inches and a 4.630-inch bore, this gasket is designed for aftermarket heads and features undersized water ports that allow for customization to your specific build. It’s designed to seal effectively without needing additional sealants.

This gasket fits a wide range of vehicles, including classic Chevrolet models like the Impala, Chevelle, and Corvette, as well as later C/K series trucks and pickups. It's a solid option when you need reliable sealing for your performance V8 build.