Drop in equivalent to White Drive Products 531-160-A51-31 hydraulic motor. Low speed, high torque. 9.52 cubic inch displacement. 6 bolt magneto flange mount. 1-1/2" tapered shaft. 7/8"-14 SAE ports. 375 RPM maximum speed. 3983 inch lbs. of torque. 15.85 GPM maximum flow rate. 2973 PSI maximum pressure differential. Clockwise rotation.