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