Looking at the mods in my Sig. How important is it to have an aftermarket adjustable fuel pressure regulator? I was thinking of nitrous down the road. Is this a necessary mod? I thought i might be running a little rich now so I was wondeirng if this is worth it. thanks guys*

 

You really should do a search. This has been explained in detail. Short version: it's a waste of money for your car.

Rich Krause

 

ditto, it is just as easy to adjust fuel via tuning (LT1 edit)