In my quest for upgrading and tuning up(regular tune up) my car one by one, I recently purchased a new fuel filter, since I'm sure that it hasn't been changed ever since purchasing the car. I hasn't been installed yet. But that's not why i made this thread. The reason why I made this, is so I can have more knowledge and know which fuel pump would be the best option for my next purchase. These are the fuel pumps that I know about: FD fuel pump, Walbro 255, and the Holley fuel pump. My car is a 91 NA S5.
After talking to a member on this board, I was told the the FD fuel pump is better, cheaper, and last longer than the Walbro 255. Then, from an outsider, I was told that the Holley fuel pump is more fuel efficient. I recently asked 200sx13b, about these 3 fuel pumps, and he made me question this even more, by saying that an external is louder than an internal. Which fuel pump would be a better purchase? Is this pump external/internal? Or is there a better fuel pump out there that I don't know about?

If this doesn't belong here, then you can move it.