Overview Similar Products –> Product Description A297 Marathon KIT 3BRK3A Brake Kit for 56/143/145 frames only. 3 Torque(LB-FT) 575 Coil Voltage These kits include a brake mounted to an external cast aluminum fan guard. Designed for easy field installation on Marathon 4-1 motors. 56, 143, and 145 frames only. Please call for availability. Product Videos Custom Field Product Reviews