Aeromotive Baffle Check Valves (Set of 5) (Fits 18309/18310)Complementing the new Apex Phantom, Aeromotive also releases its proprietary new Phantom Bladder Baffle, which literally opens and closes the door on Phantom flow control technology. While providing a continuous, high fuel flow into the Phantom Baffle using the Apex Phantom is awesome, it? s critical to allow a large volume of fuel to flow into the baffle naturally from the surrounding tank. It is also important to keep it there. The Phantom Bladder