I'm going to be buying a PFS purple box but I wanted to know before I install it: could a very slight dp leak be affecting or throwing off my a/f ratios? If so, would it be making me run leaner or richer than the stock range?

Thanks for the help

mods: catback, hi-flo, downpipe, intercooler, intake

 

If it's a "slight leak", I don't think it would. You should just have little extra noise and exhaust fumes.

However, "slight leak" is also a matter of opinion.

 

true, i should probably have that leak looked at anyway but i just wanted to hear some opinions, thanks man

 

It won't effect your mixture, and it wouldn't matter if it did. It needs to be repaired anyway, so get it fixed. Exhaust fumes in the wrong place can cause problems.