Cat C15 6 Cylinder Diesel 475 hp Engine, Air Conditioner, Cruise Control, Engine Brake, 18-Speed Manual Transmission, 12000 lb Front Axle, 20000 lb Rears, 52000 lb GVWR, Air Ride Cab, 52 in Flat Top Sleeper Cab, Aluminum Wheels, 11R24.5 Front Tires, 11R24.5 Rear Tires, Air Lift Pusher Axle, Airglide Air Ride Suspension, 327 in Wheelbase, PTO, Air Sliding 5th Wheel