Description 310 cm3/r (18.9 in3/r) Displacement20 GPM Continuous Flow (25 GPM Inter)303 RPM Maximum Speed8,184 in-lbs Continuous Torque (10,817 in-lbs Inter)SAE "A" 4-Hole Magneto Mount1.25"-14T Splined Shaft #10 ORB PortsReverse Timed Manifold Rotation Genuine Parker TG0310MS051AAAA