Machine description: Mack MP7 6 Cylinder 10.8 L Diesel 335 hp Engine, 2007 US EPA Label, 6362 Engine hrs, Mack Manual Transmission, 20000 lb Front Axle, 46000 lb Rears, 66000.0 lb GVWR, 425/65R22.5 Front Tires, 11R22.5 Re... more info about the 2008 Mack GU813.