Cometic Chevrolet 348/409 W-Series Big Block V8 .060in MLS Cylinder Head Gasket - 4.375in Bore

If you're working on a Chevrolet 348 or 409 W-Series Big Block V8, this Cometic Multi-Layer Steel (MLS) head gasket is built to handle the job. It's specifically designed for a 4.375-inch bore and a compressed thickness of 0.060 inches, ensuring a precise fit for your engine rebuild. This gasket is a solid option for a wide range of classic Chevrolet vehicles, including models like the Impala, Bel Air, and C10 Pickup from the late 1950s and early 1960s.

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 temperatures up to 482 degrees Fahrenheit. This advanced coating helps create a maximum seal, even between different block and head materials like aluminum and cast iron, and it means you don't need to use any additional sealants during installation. The center layer is uncoated stainless steel, allowing for precise thickness control.