Cometic Chevy BB Gen IV 396/402/427/454 H/G 4.320 inch Bore .066 inch MLS Head Gasket

This is a Cometic Multi-Layer Steel (MLS) head gasket designed for Chevrolet Big Block Gen IV engines. You get one gasket, made with multiple layers of stainless steel and an outer coating of Viton rubber. This gasket is built to handle the high output of performance engines and is designed to seal effectively without needing any additional sealants.

The MLS construction gives this gasket increased strength and resistance to corrosion, while the Viton coating on the outer layers can withstand temperatures up to 482°F (250°C). This makes it a solid choice for pairing aluminum heads with either aluminum or cast iron blocks, as it can manage the different expansion rates between those materials. The center layer is stainless steel and can be varied to achieve different compressed thicknesses; this particular gasket has a compressed operating thickness of 0.066 inches and a bore size of 4.320 inches.

This gasket fits a wide range of Chevrolet vehicles from the 1960s through the 1990s, including popular models like the C10 Pickup, Impala, and Corvette. It's a well-built component for rebuilding or upgrading your engine's top end.