Cummins 6 Cylinder 14.0 L Diesel 500 hp Engine, Positive Air Shutoff, Engine Brake, Eaton Fuller 18-Speed Manual Transmission, 16000 lb Front Axle, 46000 lb Rears, Aluminum Wheels, 11R22.5, 8-Bag Air Ride Suspension, 201 in Wheelbase, PTO, Wet Kit, Air Sliding 5th Wheel, Headache Rack, Dual Fuel Tanks