Cometic Chevrolet 348/409 W-Series Big Block V8 .140in MLS Cylinder Head Gasket - 4.200in Bore

When you're rebuilding the top end of a classic Chevrolet 348 or 409 W-Series big block V8, getting the cylinder head sealing right is crucial. This Cometic Multi-Layer Steel (MLS) head gasket is built to handle the demands of these powerful engines, ensuring a solid seal between your block and heads.

This gasket is constructed from multiple layers of stainless steel, which gives it increased strength and the ability to rebound. The outer layers are coated with Viton, a heat-resistant rubber material that can handle temperatures up to 482°F (250°C) and works well with different block and head materials, like aluminum to cast iron. The compressed thickness is .036 inches, and it's designed for a 4.200-inch bore, fitting World Products Man-o-War blocks and many classic Chevrolet vehicles from the late 50s and early 60s, including models like the Impala, Bel Air, and C10 pickups. Because it's an MLS gasket, it doesn't require any additional sealants, making installation more straightforward.