AutoExe Ram Air Intake System – Mazda RX-7 FD3S (Part #FDA1V5900) Carbon Fiber. Up for sale is a genuine AutoExe Ram Air Intake System, part number FDA1V5900, designed for the Mazda RX-7 FD3S. This is the highly sought-after carbon fiber ram air intake that replaces the factory airbox and directs cool outside air through internal filters for improved airflow and throttle response.
