Volvo D13H425 6 Cylinder 12.8 L Ultra Low Sulfur Diesel 425 hp Engine, 2011 US EPA Label, Requires Diesel Exhaust Fluid, Air Conditioner, Cruise Control, Power Windows, Volvo AT2612D Automated Transmission, 12500 lb Front Axle, 20000 lb Rears, Aluminum Wheels, 295/75R22.5 Front Tires, 295/75R22.5 Rear Tires, Air Ride Suspension, 148 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks