Cometic Chevy Gen1 Small Block V8 .070in MLS Cylinder Head Gasket - 4.125in Bore - 18/23 Degree Head

Starting with the Viton rubber coating on the outer layers, these Cometic Multi-Layer Steel (MLS) head gaskets are built to handle the heat and pressure of high-output engines. The compressed operating thickness is a precise 0.036 inches, and the 4.125-inch bore is designed for a round port with steam holes, fitting 18/23 degree cylinder heads. This gasket is a solid option for rebuilding or upgrading your Chevrolet Gen-1 Small Block V8, suitable for applications using aluminum heads with either aluminum or cast iron blocks.

Cometic’s MLS design uses multiple layers of stainless steel, which not only increases strength but also allows the gasket to rebound and resist corrosion. This construction helps it withstand the shearing forces that can occur between different block and head materials. The Viton coating on the outer layers is a heat-resistant synthetic rubber material capable of handling temperatures up to 482 degrees Fahrenheit, making it well-suited for demanding sealing environments and various surface finishes. The center shim layer is uncoated stainless steel and can be varied to achieve different thickness requirements, though this specific gasket is set at 0.070 inches.

These gaskets are designed to provide maximum sealing performance without the need for additional sealants, simplifying installation. They are a popular choice for many Chevrolet, Buick, and GMC vehicles from the early 1980s through the mid-1990s, including models like the Chevrolet Corvette, Camaro, and GMC C1500.