Fuel Pressure Regulator

Are they needed, or Wise to have on our Civics. I only have I/H/E on a Stock D16z6.
A friend of mine is selling a bunch of stuff and will give a me a good deal on one. However do we need one. I know our Fuel Rails are good for up 300+ hp
I did search and found nothing similar, or on google/live search.
A friend of mine is selling a bunch of stuff and will give a me a good deal on one. However do we need one. I know our Fuel Rails are good for up 300+ hp
I did search and found nothing similar, or on google/live search.