Cometic Chevy Mark-IV GM Gen-V/VI Big Block V8 .030in MLS Exhaust Mani Gasket Set-2in Square Ports

When you're rebuilding the top end of your Mark-IV or Gen-V/VI Big Block Chevy V8, getting a solid seal on your exhaust manifolds is crucial. These Multi-Layer Steel (MLS) gaskets from Cometic are built to handle the heat and pressure these powerful engines can generate, especially with their 2-inch square ports.

Cometic uses multiple layers of stainless steel for increased strength and resistance to corrosion. The outer layers are coated with Viton, a heat-resistant rubber that can handle temperatures up to 482 degrees Fahrenheit, ensuring a reliable seal even under demanding conditions. This design means you don't need any extra sealants, and the gaskets can handle the differences in expansion between aluminum heads and cast iron blocks. They're designed to be a direct fit for a wide range of Chevrolet and GM vehicles from the mid-60s through the early 80s, including models like the Impala, C10 Pickup, and Corvette.