AMD 36-volt (4-hp@4150 rpm), 48-volt (5.5-hp@5700 rpm) series motor. Speeds up to 25 mph and 50% more torque. Internal 10 spline. For maximum performance, safety, and durability, 4 gauge cables throughout the car, heavy duty solenoid, forward and reverse switch and 400+ amp controller upgrade are required. For Club Car series, not for use on Club Car PowerDrive Plus, IQ, i2 Excel or resistor carts. Controller upgrade needed. For Club Car DS electric golf cart 1990-2015 36 and 48-volt series golf cart models