Cometic Oldsmobile 330-455 V8 4.2 inch Bore .040 inch MLS Head Gasket

This Cometic Multi-Layer Steel (MLS) head gasket is built for Oldsmobile 330-455 V8 engines with a 4.2-inch bore. You get one MLS head gasket with a compressed operating thickness of 0.040 inches. This gasket is designed to provide maximum sealing performance for high-output engines and fits a wide range of vehicles, including models like the 1972-1975 Chevrolet Impala and 1975-1980 Oldsmobile 98.

Cometic MLS gaskets are constructed from multiple layers of stainless steel, which increases their strength and resistance to corrosion. 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 in demanding sealing environments. This construction means the gasket doesn't require any additional sealants and is suitable for use with both aluminum and cast iron blocks, as it can handle the shearing forces that can occur between different metal types.