Detroit DD13 6 Cylinder 12.8 L Diesel 410 hp Engine, US EPA Label, Requires Diesel Exhaust Fluid, Engine Coolant Heater, Cruise Control, Power Windows, 12000 lb Front Axle, 23000 lb Rears, Meritor rs-23-160 Drive Axles, 2.50:1 Axle Ratio, Aluminum Wheels, 295/75R22.5 Front Tires, 295/75R22.5 Rear Tires, Airliner Air Ride Suspension, 162 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks