Sierras 18-7255 Fuel Pump comes with a mounting gasket. It is designed for use with Chrysler V8 (361, 400, 413, and 440 CID) engines. The flange I.D. is 6767 and M6767. The pump is furnished with a 3/8"-24 inlet and a 1/2"-20 outlet. It is interchangeable with Chrysler Inboard 3745415 and Mallory 9-35401. Each Sierra product meets or exceeds the original equipment part it replaces.