Cometic Chevrolet Mark-IV - GM Gen-V/VI Big Block V8 .051in MLS Cylinder Head Gasket - 4.570in Bore

Cometic Gasket is a well-known name for creating solid engine sealing products. This Multi-Layer Steel (MLS) head gasket is built for Chevrolet Mark-IV and GM Gen-V/VI Big Block V8 engines, designed to handle the demands of high-output applications. It features a compressed operating thickness of 0.051 inches and a 4.570-inch bore, making it suitable for aftermarket heads and offering undersized water ports for customization.

The construction 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 can handle temperatures up to 482°F (250°C) and works well with both aluminum and cast iron blocks. This design ensures maximum sealing performance without the need for additional sealants, and it's built to withstand the shearing forces that can occur between different block and head materials.

This gasket fits a wide range of vehicles, including many Chevrolet models like the Bel Air, C10 Pickup, Camaro, and Corvette from various years. It's a solid option when rebuilding or modifying your Big Block V8, especially when using aftermarket cylinder heads.