Cummins ISX15 15 L Ultra Low Sulfur Diesel 450 hp Engine, 2015 US EPA Label, Requires Diesel Exhaust Fluid, 22375 Engine hrs, Air Conditioner, Cruise Control, Power Windows, Exhaust Brake, Eaton Fuller RTOCM -16909A 9-Speed Manual Transmission, Differential Lock, 13200 lb Front Axle, 38000 lb Rears, Meritor RT-40-145 Drive Axles, 3.42:1 Axle Ratio, 51200 lb GVWR, Air Ride Cab, 80 in Mid Roof Sleeper Cab, Bunk Beds, Bunk Heater, 295/75R22.5 Front Tires, 295/75R22.5 Rear Tires, Flex Air Air Ride Suspension, 240 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks