Cummins ISX15 6 Cylinder 550 L Engine, 2016 US EPA Label, CARB Compliant, Requires Diesel Exhaust Fluid, 4288 Engine hrs, Engine Brake, Eaton Fuller 18-Speed Transmission, Differential Lock, 14320 lb Front Axle, 46000 lb Rears, 60320:1 Axle Ratio, Air Ride Cab, Mid Roof Sleeper Cab, Aluminum Wheels, 11R22.5, 8-Bag Air Ride Suspension, 256 in Wheelbase, PTO, Wet Kit, Headache Rack, Dual Fuel Tanks