Cometic Chevy Mark-IV GM Gen-V/VI Big Block V8 .040in MLS Cyl Head Gasket-4.680in Bore-Round Bore

Cometic Gasket is well-known for making dependable engine sealing solutions. This Multi-Layer Steel (MLS) cylinder head gasket is built for Chevrolet Mark-IV, GM Gen-V/VI Big Block V8 engines. It features a .040 inch thickness and a 4.680 inch bore diameter, designed for a round port configuration. This gasket is a solid option for rebuilding or repairing a wide range of these classic V8s, including models like the Chevrolet C10 Pickup, Camaro, and Impala from the mid-60s through the early 80s.

MLS gaskets are a popular choice for performance and heavy-duty applications because they offer excellent sealing under high pressure and temperature. The multiple steel layers conform to the mating surfaces, creating a strong seal that resists leaks. This particular gasket is sized for a 4.680 inch bore, which is common for many big block V8 configurations, and its .040 inch thickness is a standard dimension for many builds. Using the correct gasket is crucial for proper engine compression and preventing coolant or oil leaks between the cylinder head and the engine block.