Cometic Chevy Mark-IV Big Block V8 .040in MLS Cylinder Head Gasket - 4.580in Bores

This Cometic Multi-Layer Steel (MLS) head gasket is specifically made for Chevrolet Mark IV Big Block V8 engines and features a .040 inch thickness with 4.580 inch bores. The valve pocketed bores are designed to seal effectively around the combustion chamber, especially on open deck blocks. This gasket is a solid option for a wide range of Chevrolet vehicles from the mid-60s to the late 70s, including models like the Impala, C10 Pickup, and Corvette.

The key to this gasket's performance is its HP shim technology, which increases the clamping force around the combustion chamber. This helps to create a stronger seal, which is crucial for maintaining proper engine compression and preventing leaks. The outer layers of the gasket are embossed and coated with Viton, a material known for its excellent resistance to heat and oil, further enhancing its sealing capabilities and durability under demanding conditions.