Cometic Chevrolet Mark-IV Big Block V8 .027in MLS Cylinder Head Gasket - 4.540in Bore

If you're working on a Chevrolet Mark IV Big Block V8 and need a new head gasket, this Multi-Layer Steel (MLS) gasket from Cometic is a solid option. It's built with multiple layers of stainless steel, giving it the strength to handle high-output engines. The outer layers are coated with Viton, a heat-resistant rubber material that seals exceptionally well, even with different block and head materials like aluminum to cast iron. This means you don't need to worry about sealants; the gasket itself provides maximum sealing performance.

The compressed thickness on this particular gasket is .027 inches, and it's designed for a 4.540-inch bore. MLS gaskets are known for their durability and ability to resist corrosion, thanks to the stainless steel construction. They can also handle the shearing forces that can occur when mating dissimilar metals, making them a reliable choice for a wide range of Chevrolet V8 applications from the mid-60s through the early 90s, including popular models like the Impala, Chevelle, and C10 pickups.