Cummins ISX15 6 Cylinder 15 L Diesel 425 hp Engine, 2010 US EPA Label, Requires Diesel Exhaust Fluid, Engine Brake, Eaton Fuller 10-Speed Manual Transmission, 12000 lb Front Axle, 38000 lb Rears, 50000 lb GVWR, Aluminum Wheels, 295/75R22.5, Air Ride Suspension, 187 in Wheelbase, PTO, Wet Kit, Air Sliding 5th Wheel