Description Now you can get the Reverse Module for the Savage 21 Monster Truck! All the necessary linkage are included with the module, which is fully assembled (as shown). Complete instructions show you how to quickly and easily install the Reverse Module with a servo you provide. Any standard size basic servo will work - a high torque/high strength servo is unnecessary. Required Parts One standard servo 3 channel radio system (3rd channel must be switching type, not proportional) Installation into the Savage vehicle<