Cometic Chevrolet Mark-IV Big Block V8 4.540in Bore .040in MLS Cylinder Head Gasket

Cometic Gasket is known for making well-built sealing components, and this Multi-Layer Steel (MLS) head gasket is a prime example. It’s designed for Chevrolet Mark IV Big Block V8 engines and features a 4.540-inch bore with a compressed thickness of 0.040 inches. This gasket is built to handle the demands of high-output engines, offering maximum sealing performance without needing additional sealants.

This gasket is constructed from multiple layers of stainless steel, which gives it increased strength and resistance to corrosion. 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 different block and head materials, including aluminum to aluminum or aluminum to cast iron. The center layer is stainless steel, allowing for precise thickness control. This design helps withstand the shearing forces that can occur between dissimilar metals.

This gasket fits a wide range of Chevrolet vehicles from the mid-60s through the early 90s, including models like the C10 Pickup, Camaro, and Impala. It's a solid option for rebuilding or upgrading your engine's top end.