Equip your semi to be Ready for the Road Ahead , with the Kit Masters Remanufactured HT/S Fan Clutch, a crucial device to properly cool an engine in a complete range of temperatures. Due 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. Engineered with an easy-to-install body that works to silently cool the engine. FleetPride is your First Click in Heavy Duty .