Dual Electric Fan Assembly features high performance SPAL fans with a steel fan shroud that mounts to original mounting locations. Shroud has six bypass flaps that open at highway speed to allow excess air to flow through and close at low speeds to maximize cooling capacity. Dual 13" fans flow 1,777 CFM each and are controlled by a heavy-duty relay and adjustable thermostat. Fan assembly is 5" deep and requires a minimum of a 70 amp output alternator. Includes wiring harness and installation instructions.