Cummins ISX 6 Cylinder 15 L Diesel 450 hp Engine, 2009 US EPA Label, 5897 Engine hrs, Engine Brake, Eaton Fuller 18-Speed Manual Transmission, Double Differential Locks, 14600 lb Front Axle, 40000 lb Rears, 54600 lb GVWR, Air Ride Cab, Aluminum Wheels, 12R22.5 Front Tires, 11R22.5 Rear Tires, Low Air Leaf Air Ride Suspension, 184 in Wheelbase, PTO, Wet Kit, Air Sliding 5th Wheel, Dual Fuel Tanks