Cometic AMC 290/304/343/360 Gen-2/3 V8 .030in MLS Cylinder Head Gasket - 4.140in Bore

This product is a Cometic Multi-Layer Steel (MLS) cylinder head gasket designed for AMC 290, 304, 343, and 360 Gen-2/3 V8 engines. It features a 4.140-inch bore and is 0.030 inches undersize, meaning it's intended for engines that have been bored out by that amount. You get one well-built MLS head gasket in this package, ready to help seal your engine's combustion chambers.

Cometic builds these gaskets with multiple layers of stainless steel for strength and rebound resistance, which helps them handle the stresses of high-output engines. The outer layers are coated on both sides with Viton, a heat-resistant rubber material that can handle temperatures up to 482 degrees Fahrenheit. This Viton coating ensures a reliable seal even with aluminum heads bolted to cast iron blocks, as it can manage the shearing forces that occur between dissimilar metals. The center layer is stainless steel and can be varied in thickness to meet different engine build requirements; this specific gasket has a compressed operating thickness of 0.098 inches.

This gasket fits a wide range of American Motors and Jeep vehicles from the late 1960s through the early 1990s, including models like the Jeep Cherokee and American Motors Matador. Because it's an MLS gasket, it doesn't require any additional sealants, making installation more straightforward.