Cummins ISB6.7 6 Cylinder 6.7 L Diesel 325 hp Engine, 2015 US EPA Label, Requires Diesel Exhaust Fluid, Exhaust Brake, Automatic Transmission, 7250 lb Front Axle, 13500 lb Rears, Aluminum Wheels, 225/70R19.5 Front Tires, 225/70R19.5 Rear Tires, Spring Suspension, 11 ft 6 in x 92 in Bed