Cummins ISX12 6 Cylinder 11.9 L Ultra Low Sulfur Diesel 425 hp Engine, 2013 US EPA Label, Requires Diesel Exhaust Fluid, 16605 Engine hrs, Air Conditioner, Cruise Control, Power Windows, Engine Brake, Eaton Fuller FRO-16210C 10-Speed Manual Transmission, 13201 lb Front Axle, 37998 lb Rears, Spicer RSP40 Drive Axles, 3.70:1 Axle Ratio, 51200 lb GVWR, Air Ride Cab, Aluminum Wheels, 11R22.5 Front Tires, 11R22.5 Rear Tires, Air Leaf Air Ride Suspension, 202 in Wheelbase, PTO, Wet Kit, Air Sliding 5th Wheel, Headache Rack, Dual Fuel Tanks