Prepare your semi to be Ready for the Road Ahead , with the Horton DM Advantage 2-Speed Fan Clutch Quick Kit that offers proper engine cooling in a complete range of temperatures. To maintain a functional engine temperature, this replacement component controls the operation of the engine cooling fan by applying or removing power as needed. Fashioned with an easy-to-install body that quietly works to cool the engine. FleetPride is your First Click in Heavy Duty .