Cummins N14 6 Cylinder Diesel Engine, Engine Brake, 13-Speed Manual Transmission, 40000 lb Rears, 52000 lb GVWR, 72 in Mid Roof Sleeper Cab, Auxiliary Power Unit, Aluminum Wheels, 11R24.5 Front Tires, 11R24.5 Rear Tires, Hendrickson Air Ride Suspension, 260 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks