Cometic Chevrolet 348/409 W-Series Big Block V8 .027in MLS Cylinder Head Gasket - 4.200in Bore

This product is a Cometic Multi-Layer Steel (MLS) cylinder head gasket designed for Chevrolet 348/409 W-Series Big Block V8 engines. It features a 4.200-inch bore and a compressed operating thickness of 0.036 inches, with an initial thickness of .027 inches. This gasket is built to handle the demands of high-output engines and fits a range of classic Chevrolet vehicles, including models like the Impala, Bel Air, and C10 Pickup from the late 1950s and early 1960s.

Comprised of multiple embossed layers of stainless steel, this MLS gasket offers increased strength and the ability to rebound, which helps resist corrosion. The outer layers are coated on both sides with Viton, a heat-resistant rubber material capable of withstanding temperatures up to 482 degrees Fahrenheit. This coating is designed to perform in harsh sealing environments and works well with various surface finishes, making it suitable for both aluminum and cast iron block applications. The center layer is uncoated stainless steel, allowing for variations in thickness to meet specific requirements.