Mack MP8 6 Cylinder 12.8 L Ultra Low Sulfur Diesel 338 hp Engine, 2009 US EPA Label, Air Conditioner, Cruise Control, Engine Brake, Eaton Fuller UltraShift Automatic Transmission, 12000 lb Front Axle, 40000 lb Rears, 52000 lb GVWR, Air Ride Cab, Aluminum Wheels, 11R22.5 Front Tires, 11R22.5 Rear Tires, Air Ride Suspension, 198 in Wheelbase, PTO, Air Sliding 5th Wheel, Dual Fuel Tanks