Cummins ISX 6 Cylinder 15.0 L Diesel 475 hp Engine, 2006 US EPA Label, CARB Compliant, Positive Air Shutoff, Webasto Engine Coolant Heater, 14872 Engine hrs, Engine Brake, Eaton Fuller 18-Speed Manual Transmission, Differential Lock, 16000 lb Front Axle, 52998 lb Rears, 68998 lb GVWR, Air Ride Cab, 51 in Flat Top Sleeper Cab, Aluminum Wheels, 385/65R22.5 Front Tires, 11R24.5 Rear Tires, Neway Air Ride Suspension, 260 in Wheelbase, Air Sliding 5th Wheel, Headache Rack