Detroit DD15 6 Cylinder 15 L Ultra Low Sulfur Diesel 505 hp Engine, 2017 US EPA Label, Requires Diesel Exhaust Fluid, Air Conditioner, Air Ride Cab, 70 in High Rise Sleeper Cab, Aluminum Wheels, 295/75R22.5 Front Tires, 295/75R22.5 Rear Tires, Airliner Air Ride Suspension, 240 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks