Titan® 12T Modified Motor. The Titan 12T 550 modified motor is designed for incredible mod-motor power output with virtually maintenance-free operation, and long-lasting performance. The Titan 12T 550 motor™s integrated cooling fan pulls cool air through the motor to keep temperatures down. A cooler running motor allows faster speeds, longer runtime, and extended motor life.. NOTE: Titan 12T motors are intended for use in single motor and single battery pack applications, up to 8.4 volts.