Cat 3406 14.6 L Diesel 496 hp Engine, Air Conditioner, Cruise Control, Engine Brake, Eaton Fuller 18-Speed Manual Transmission, Differential Lock, 12000 lb Front Axle, 40000 lb Rears, 25000 lb GVWR, Air Ride Cab, 58 in Flat Top Sleeper Cab, Aluminum Wheels, 11R24.5 Front Tires, 11R24.5 Rear Tires, Airliner Air Ride Suspension, 258 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks