Prepare your semi to be Ready for the Road Ahead , with the Horton 2.56" Clockwise 9-Blade Sucker Fan that provides a cool and reliable motor. By creating a low pressure zone and a downward movement of air, this replacement fan is a suitable option to direct cool air towards the engine. Built with a clockwise rotation to maximize engine cooling during vehicle operation. FleetPride is your First Click in Heavy Duty .