[Dark_5.0]

Yes it would if you get a custom burned chip. The FPR is only useful if you are outgrowing your injectors basicly.

Like I am my 19# injectors are reaching there limit on my 5.0 so I uped the fuel pressure to 45psi.

If your stang is speed density then the FPR is a very usefull tool even with only light mods. The computer wont boost the amount of fuel delivered in a speed density system so you have to manualy do it with the regulator.