Prepare your semi to be Ready for the Road Ahead , with the Horton Remanufactured DM Advantage On / Off Fan Clutch that offers proper engine cooling in a complete range of temperatures. Thanks to its temperature-based design, this replacement component is able to control the operation of the engine's cooling fan by applying or removing power as needed. Crafted with an easy-to-install body that works to silently cool the engine. FleetPride is your First Click in Heavy Duty .