Cat C15 6 Cylinder 15.2 L Ultra Low Sulfur Diesel 525 hp Engine, Webasto Engine Coolant Heater, Air Conditioner, Cruise Control, Power Windows, Engine Brake, Eaton Fuller 18-Speed Manual Transmission, Eaton Fuller 2-Speed Auxiliary Transmission, Triple Differential Locks, 16000 lb Front Axle, 63000 lb Rears, Meritor RZ-69-166 Drive Axles, 4.89:1 Axle Ratio, 79000 lb GVWR, Air Ride Cab, 60 in High Rise Sleeper Cab, Aluminum Wheels, 385/65R22.5 Front Tires, 11R24.5 Rear Tires, Double Frame, Airliner Air Ride Suspension, 259 in Wheelbase, Air Sliding 5th Wheel, Headache Rack, Lowboy Ramps, Dual Fuel Tanks