Cometic Chevrolet Gen-1 Small Block V8 .051in MLS Cylinder Head Gasket - 4.030in Bore

When you're rebuilding the top end of your Chevrolet Gen-1 Small Block V8, a solid head gasket is crucial for sealing combustion pressures and coolant passages. This Multi-Layer Steel (MLS) gasket from Cometic is built for that job, offering a 4.030-inch bore and a compressed thickness of 0.051 inches. It's designed to handle the demands of high-output engines, making it a popular choice for performance builds.

Cometic constructs these MLS gaskets from multiple layers of stainless steel, which gives them strength and the ability to rebound, resisting corrosion. The outer layers are embossed and coated with Viton, a heat-resistant rubber material that can handle tough sealing environments and various surface finishes. This construction means you don't need to use any extra sealants, and it works well with both aluminum and cast iron blocks, even when pairing aluminum heads with cast iron blocks. The center shim layer is stainless steel and can be varied to achieve different thicknesses, like this 0.051-inch version. These gaskets are also noted for having undersized water ports on aftermarket heads, allowing for customization during installation.

This gasket fits a wide range of Chevrolet and GMC trucks, cars, and SUVs from the early 1980s, as well as some Avanti and Excalibur models. It's a well-built component for anyone looking to ensure a proper seal during their engine build.