Sierra's 18-7281 Fuel Pump comes with a mounting gasket. It is designed for use with GM V8 (305 & 350 CID) engines. The flange ID is 61125/6973. Interchangeable with Mallory 9-35421, EMP 35-35281, OMC Inboard 981650, Volvo Penta 826493, and OMC Stern Drive 3853792, 3855276, and 981650. Each Sierra product meets or exceeds the original equipment part it replaces.