Cometic Chevrolet 348/409 W-Series Big Block V8 .045in MLS Cylinder Head Gasket - 4.437in Bore

When you're rebuilding the top end of your Chevrolet 348 or 409 W-Series Big Block V8, getting the cylinder head gaskets right is crucial for a solid seal. This Multi-Layer Steel (MLS) gasket from Cometic is designed to handle the demands of these powerful engines, ensuring reliable performance whether you're working with aluminum or cast iron blocks.

Cometic builds these gaskets with multiple layers of stainless steel for increased strength and resistance to corrosion. The outer layers are coated with Viton, a heat-resistant rubber material that can handle tough sealing environments and various surface finishes, up to 482°F. The compressed thickness is a precise 0.045 inches, and the 4.437-inch bore diameter is specific for these W-Series engines. Because they're MLS, these gaskets don't require any additional sealants, making installation more straightforward.

This gasket fits a range of classic Chevrolet vehicles from the late 1950s and early 1960s, including models like the Impala, Bel Air, and C10 Pickup. It's a well-built component designed for engines that produce significant power.