Cometic Chevrolet 348/409 W-Series Big Block V8 .056in MLS Cylinder Head Gasket - 4.437in Bore

Starting with a compressed operating thickness of 0.036 inches, this Cometic Multi-Layer Steel (MLS) head gasket is built for serious sealing performance on Chevrolet 348/409 W-Series Big Block V8 engines. It’s designed to handle the demands of high-output applications, whether you're pairing aluminum heads with an aluminum block or aluminum heads with cast iron. The multiple stainless steel layers provide increased strength and the ability to rebound, while also resisting corrosion. This well-built gasket is intended for a range of classic Chevrolet vehicles from the late 1950s and early 1960s, including models like the Impala, Bel Air, and C10 Pickup.

The outer layers of this gasket are embossed and coated on both sides with Viton, a heat-resistant rubber material rated up to 482 degrees Fahrenheit. Viton is chosen for its ability to perform in harsh sealing environments and under various load conditions. The center layer is uncoated stainless steel, allowing for different thickness options to be achieved. Because it's an MLS design, it doesn't require any additional sealants, making installation more straightforward.