Detroit Series 60 6 Cylinder 12.7 L Ultra Low Sulfur Diesel 455 hp Engine, 2006 US EPA Label, Air Conditioner, Cruise Control, Eaton Fuller 10-Speed Manual Transmission, 12000 lb Front Axle, 20000 lb Rears, 32000 lb GVWR, Air Ride Cab, 295/75R22.5 Front Tires, 295/75R22.5 Rear Tires, Airliner Air Ride Suspension, 164 in Wheelbase, Dual Fuel Tanks