This fuel tank cap by Stant is a direct replacement for 71-74 Buick, Cadillac, Chevrolet, and GMC vehicles, as well as 71-79 Chrysler models. It is a high-quality cap. The cap is designed to fit securely and prevent fuel leaks. The cap is an emissions cap,not vented. It has interchange part numbers G 807 and 10807.This is a genuine Stant product, and it is easy to install. Order now and keep your fuel tank secure while driving.