Aftermarket exhaust for the Nismo?
 

Are there any gains to be had if I were to swap out the stock Nismo exhaust on my car for an aftermarket one? I don't know what the gains are on the Nismo exhaust compared to the regular 370 exhaust. I think the Nismo exhaust is 2.5" throughout so I would think it already flows pretty well. I'm just wondering if there is anything better out there that will actually produce gains and not just sound better.

The Nismo exhaust flows a little better than stock and gives modest gains, but most of the aftermarket exhausts flow much better and will give more power than the Nismo. Check out Stillen, Fast Intentions, Berk, Greddy, and Invidia. There are a few others out there, but those are the ones that are most popular with forum members. Try the search feature. Tons of info on here!

Good luck!