This upgrade kit makes it easy to add up to four Falcon 500 motors to the Toughbox Mini or Toughbox Micro gearboxes in your AM14U4 chassis. We've also included the correctly sized hardware to retain the motor into the gearbox without damaging the internal rotor, as well as the right screw to retain the 14T spline bore gear on the Falcon 500's spline shaft.

Note: This upgrade kit is specifically for Toughbox series gearboxes with a 14T-50T 20DP first stage. It is not compatible with the EVO family of gearboxes. This upgrade kit does not include the Falcon 500 motors.