Cummins ISX 14.9 L Diesel 400 hp Engine, 2008 US EPA Label, Air Conditioner, Digital Mirrors, Eaton Fuller 9-Speed Manual Transmission, Differential Lock, 12350 lb Front Axle, 38000 lb Rears, 50350 lb GVWR, Air Ride Cab, 61 in High Rise Sleeper Cab, Aluminum Wheels, 295/75R22.5, Air Ride Suspension, 275 in Wheelbase, Air Sliding 5th Wheel, Headache Rack, Dual Fuel Tanks