Cummins ISX 6 Cylinder 15 L Ultra Low Sulfur Diesel 400 hp Engine, US EPA Label, 23859.3 Engine hrs, Engine Brake, Eaton Fuller FRM16210B 10-Speed Manual Transmission, 12000 lb Front Axle, 22700 lb Rears, Dana S23-190 Drive Axles, 2.53:1 Axle Ratio, 34700 lb GVWR, Air Ride Cab, Aluminum Outer Wheels, 385/65R22.5 Front Tires, 295/75R22.5 Rear Tires, Paccar Air Ride Suspension, 204 in Wheelbase, Air Sliding 5th Wheel, Headache Rack, Dual Fuel Tanks, drop axle headache rack