Machine description: Mack MP7 6 Cylinder 10.8 L Diesel 325 hp Engine, 2012 US EPA Label, Requires Diesel Exhaust Fluid, Mack 6-Speed Manual Transmission, 20000 lb Front Axle, 44000 lb Rears, 64000 lb GVWR, Air Ride Cab, A... more info about the 2013 Mack GU713.