Cometic Chevy BB 4.540in Bore .030 inch MLS 396/402/427/454 Head Gasket

Starting with a compressed operating thickness of 0.030 inches, this Cometic Multi-Layer Steel (MLS) head gasket is built for serious performance. It's constructed from multiple layers of stainless steel, giving it the strength to handle the demands of high-output engines. 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 with both aluminum and cast iron blocks, even when they're paired together. This design means you won't need any extra sealants for a solid seal.

The multi-layer stainless steel construction not only adds strength but also allows the gasket to rebound and resist corrosion, which is crucial for longevity. The center layer is uncoated stainless steel and can be varied to achieve different thickness requirements, like the 0.030 inch specification on this particular gasket. This gasket is a solid option for a wide range of Chevrolet Big Block Mark IV V8 engines, including popular models like the Chevrolet Impala, C10 Pickup, and Corvette from the mid-60s through the mid-70s.