Equip your semi to be Ready for the Road Ahead with the Muncie S Series Power Take-Off Air Shift Installation Kit, a crucial kit that installs an air shift mechanism in the PTO. Thanks to its ability to work with compressed air, this installation kit allows operators to engage / disengage the PTO as needed. Crafted with aluminum and steel components to provide long-lasting durability. FleetPride is your First Click in Heavy Duty .