Cometic Chevrolet Mark-IV - GM Gen-V/VI Big Block V8 .120in MLS Cylinder Head Gasket - 4.310in Bore

If you're working on a Chevrolet Mark-IV or GM Gen-V/VI Big Block V8 engine, this Cometic Multi-Layer Steel (MLS) head gasket is built to handle the demands of high-output applications. It's designed for a 4.310-inch bore and has a compressed thickness of .120 inches, making it a solid choice for many performance builds. This gasket is suitable for use with aftermarket heads, and it features undersized water ports that allow for customization to your specific setup.

Cometic's MLS gaskets are well-built with multiple layers of stainless steel, which gives them increased strength and the ability to rebound, helping to resist corrosion. The outer layers are embossed and coated with Viton, a heat-resistant rubber material that can handle tough sealing environments and various surface finishes. This construction means the gasket seals effectively without needing additional sealants, and it works well with both aluminum and cast iron blocks, even when paired with aluminum heads, as it can withstand the shearing forces between different metals.

This gasket is a popular choice for a wide range of vehicles, including models like the Chevrolet Impala, C10 Pickup, and Corvette from the mid-60s through the mid-70s, as well as some later C/K series trucks. It's designed to provide reliable sealing for your engine's top end.