The Atlas Air Force AF13 Gas 13HP 30-Gallon Air Compressor is powered by a Honda GX390 13HP, electric-start gas engine. It features a pneumatic throttle control, electric-start system, vibro-isolator pads for reduced vibration, a built-in charging system, and head unloaders. The AF13G operates between 145 and 175 psi, providing the air power needed to run large impact wrenches capable of removing BUDD wheel lug nuts.