I though rising rate fuel pressure regulators were only for forced induction applications? At least from what I read. Maybe Explain it better? Well I was thinking of getting the nismo regulator and a guage off gspec, but like I said I thought I'd try here first. I also need a new one because I noticed mine had gotten slightly bent, which I hope that wasn't affecting anything too much. better safe than sorry though.
When using forced induction you want a regulator that will be constant 1psi fuel to 1psi boost to create a pressure differential.
The same regulator (good quality) will work great in na application and intact be of better quality.
The stock fpr does do a riseing rate.