AirLift 25856 Load Controller - AIR:25856, Load Controller Dual Heavy Duty Compressor - dual needle guage on board air system for air overload springs, Dual path system, Controls two bags individually. Airlift supplies various air overload kit accessories such as air lines, fittings, compressors and controllers. These accessories can be a big help when installing or repairing an air overload system with leaks or other problems. LoadController On Board Air Compressor System is the quick and convenient way to inflate and deflate your vehicle’s air springs while on the go. The last place you probably want to drive your loaded vehicle and trailer is into a tiny gas station to add air to your bags. With a LoadController system that problem is solved.