D13H500 6 Cylinder 12.8 L Ultra Low Sulfur Diesel 500 hp Engine, 2011 US EPA Label, Requires Diesel Exhaust Fluid, Air Conditioner, Cruise Control, Power Windows, Engine Brake, ATO2612D Automatic Transmission, Differential Lock, 13200 lb Front Axle, 38000 lb Rears, 51200 lb GVWR, Air Ride Cab, 38 in Flat Top Sleeper Cab, Aluminum Wheels, 295/75R22.5 Front Tires, 285/75R24.5 Rear Tires, Air Assi...