Cometic Chevrolet 348/409 W-Series Big Block V8 .040in MLS Cylinder Head Gasket - 4.375in Bore

This Cometic Multi-Layer Steel (MLS) head gasket is built with multiple embossed layers of stainless steel, featuring an outer coating of Viton rubber. This construction is designed to handle the demands of high-output engines and provides a compressed operating thickness of .040 inches with a 4.375-inch bore diameter, making it a solid choice for your Chevrolet 348/409 W-Series Big Block V8 rebuild.

MLS gaskets are known for their strength and ability to rebound, resisting corrosion thanks to their stainless steel layers. The Viton coating on the outer layers is a heat-resistant material, capable of withstanding temperatures up to 482°F (250°C), which is crucial for sealing in harsh engine environments and across different surface finishes. This design means you won't need additional sealants, and it works well with both aluminum and cast iron blocks, effectively managing the shearing forces that can occur between dissimilar metals.

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. It's a well-built component for anyone looking to ensure a reliable seal in their engine.