Cummins ISX 6 Cylinder 550 hp Engine, Engine Brake, Eaton Fuller 18-Speed Transmission, Differential Lock, 46000 lb Rears, Sleepair Diesel Sleeper Air Conditioner, Excelsior Inverter 3000 Auxiliary Power Unit, 385/65R22.5 Front Tires, 11R22.5 Rear Tires, Air Ride Suspension, 4400 mm Wheelbase, GVM 26.5 t, GCM 120 t