Only the top one, unless you count the crappy thing in the tank that has little screens in it that can get stopped up. I highly recommend removing it and doing the tank and prepump filter mods, may save you if you get a bad load of fuel plus helps keep the air out of the injectors and makes the factory filter last longer. The frame mount filter I used only cost $5 for replacement elements. the entire mod cost me $35
Take a look at this
alabamafrog/Powerstroke Fuel system - Photobucket - Video and Image Hosting