Cometic Chevrolet Mark-IV Big Block V8 .086in MLS Cylinder Head Gasket - 4.630in Bore

When you're rebuilding the top end of a Chevrolet Mark IV Big Block V8, getting the cylinder head seal right is crucial for performance and reliability. This Multi-Layer Steel (MLS) head gasket from Cometic is built to handle the demands of these powerful engines, offering a strong seal that doesn't require any additional sealants. It's designed to work well whether you're mating aluminum heads to an aluminum block or aluminum heads to a cast iron block, resisting the shearing forces that can occur between different metals.

The construction features multiple layers of stainless steel for increased strength and resistance to corrosion. The outer layers are embossed and coated with Viton, a heat-resistant rubber material that can handle temperatures up to 482 degrees Fahrenheit, ensuring a reliable seal even under tough conditions. The center layer is uncoated stainless steel, and its thickness can be varied to meet different sealing requirements, with this specific gasket having a compressed thickness of 0.086 inches and a bore size of 4.630 inches. This well-built gasket fits a wide range of Chevrolet vehicles from the mid-60s through the early 80s, including popular models like the Impala, Chevelle, and C10 Pickup.