Chevrolet Performance BBC Gen V/VI Rear Main Seal O-Ring | 6264902

Chevrolet Performance rear main seal O-ring for Big Block Chevy Gen V/VI engines. Measures 0.565in ID, 0.77in OD, and 0.1in thick, made from black rubber for a reliable seal. Designed for racing or street applications, prevents oil leaks at the crankshaft. Sold as each.