Cometic Chevy Gen1 Small Block V8 .066in MLS Cylinder Head Gasket - 4.100in Bore

This is the Cometic C5270-066 Multi-Layer Steel (MLS) cylinder head gasket, specifically made for Chevrolet Gen-1 Small Block V8 engines. It features a .066 inch thickness and a 4.100 inch bore, designed to handle the 18/23 degree head angle and valve pocketed bores common in these engines. If you're rebuilding the top end of your classic Chevy or GMC V8, a solid head gasket is crucial for sealing combustion pressures and coolant passages.

Cometic builds these gaskets using three to five layers of stainless steel. This material choice gives them strength, resilience, and resistance to corrosion, which is important in the harsh environment of an engine. The outer layers are coated on both sides with Viton, a heat-resistant rubber material that can handle temperatures up to 482°F (250°C). This coating helps the gasket conform to the cylinder head and block surfaces, ensuring a tight seal even under demanding conditions and across different surface finishes.

This gasket fits a wide range of vehicles from the early 1980s, including popular models like the Chevrolet C10, Camaro, and Caprice, as well as GMC C1500 trucks. It's a well-built component that helps ensure your engine rebuild is sealed up tight and ready to run.