Cummins ISX15 6 Cylinder 15 L Ultra Low Sulfur Diesel 600 hp Engine, 2012 US EPA Label, Requires Diesel Exhaust Fluid, 23223.8 Engine hrs, Air Conditioner, Cruise Control, Power Windows, Engine Brake, Eaton Fuller Manual Transmission, 20000 lb Front Axle, 46000 lb Rears, 3.91:1 Axle Ratio, 80000 lb GVWR, Air Ride Cab, 63 in Mid Roof Sleeper Cab, Aluminum Wheels, 425/65R22.5 Front Tires, 11R22.5 Rear Tires, Air Lift Pusher Axle, Dual Steering Boxes, Double Frame, Air Ride Suspension, 273 in Wheelbase, Air Sliding 5th Wheel, Headache Rack, Lowboy Ramps, Dual Fuel Tanks