Cat C15 6 Cylinder Diesel Engine, Webasto Engine Coolant Heater, Engine Brake, Eaton Fuller 13-Speed Manual Transmission, 12000 lb Front Axle, 40000 lb Rears, 52000.0 lb GVWR, Air Ride Cab, 60 in High Rise Sleeper Cab, Bunk Beds, Bunk Heater, Aluminum Wheels, 11R22.5, Airliner Air Ride Suspension, 230 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks