The Fantom Helix RS Team Edition Spec Brushless Motor is a great option for a pro racing motor. Made with a dual-balanced rotor and a refined stator design, this motor will provide smooth operation at peak RPM. The improved stator position and silver-plated collector ring increase efficiency allowing for maximum torque. This Team Edition motor comes professionally built to strict standards, which include shimming the rotor with Teflon shims & spacer, the highest grade AXON X10 SUJ2 hybrid bearings and pro titanium timing adjustment screws. All test results are printed and included.