Product Details: Outfit your semi to be Ready for the Road Ahead™ with proper engine cooling in a complete range of temperatures, with the Borg Warner Kysor Rear Air On/Off Fan Clutch. 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. Fashioned with an easy-to-install body that quietly works to cool the engine. <br/><br/>FleetPride is your First Click in Heavy Duty®.