Edelbrock part #12415 Fuel Bowl Inverted Flare Fitting is a 3/8" inverted flare fuel inlet fitting. The fitting is designed for use with Holley 2300, 4150, 4150HP and 4160 (center hung floats only), 4500, 4500HP and Rochester Quadrajet applications up to 1974. The fitting has 7/8"-20 threads and comes with sealing washers.