Cometic Chevrolet 348/409 W-Series Big Block V8 .066in MLS Cylinder Head Gasket - 4.437in Bore

Cometic Gasket is a well-known name for creating dependable engine sealing solutions, and this Multi-Layer Steel (MLS) head gasket is no exception. It’s built specifically for Chevrolet 348/409 W-Series Big Block V8 engines, featuring a 4.437-inch bore and a compressed thickness of .066 inches. This gasket is designed to handle the demands of high-output engines, ensuring a solid seal between your cylinder heads and block.

This MLS gasket is constructed from multiple layers of stainless steel, which gives it increased strength and the ability to rebound, helping it resist corrosion. The outer layers are coated with Viton, a heat-resistant rubber material that can handle temperatures up to 482 degrees Fahrenheit, making it suitable for sealing aluminum heads to aluminum blocks or aluminum heads to cast iron blocks. The center layer is uncoated stainless steel and can be varied to achieve different thicknesses, like the .066 inches on this particular gasket. Because it's an MLS design, it doesn't require any additional sealants, simplifying installation. This gasket fits a range of classic Chevrolet vehicles, including models like the Impala, Bel Air, and C10 Pickup from the late 1950s and early 1960s.