Cometic Chevrolet Mark-IV Big Block V8 .086in MLS Cylinder Head Gasket - 4.375in Bore

If you're rebuilding the top end of a Chevrolet Mark-IV Big Block V8, a solid head gasket is crucial for sealing combustion pressures. This Multi-Layer Steel (MLS) gasket from Cometic is built to handle the demands of high-output engines, ensuring a reliable seal without the need for additional sealants.

Constructed with multiple layers of stainless steel, this gasket offers increased strength and resistance to corrosion. The outer layers are embossed and coated with Viton, a heat-resistant rubber material capable of withstanding extreme temperatures up to 482°F (250°C). This makes it suitable for applications using aluminum heads with either aluminum or cast iron blocks, as it can manage the shearing forces between dissimilar metals. The center layer is uncoated stainless steel, allowing for precise thickness control, and this particular gasket has a compressed operating thickness of 0.086 inches with a 4.375-inch bore.

This 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. It's a well-built component designed for durability and performance in demanding engine builds.