The NISMO exhaust is only worth about 7-8hp over stock. It costs only a few hundred less than fast intentions but doesn't give the same 15-18hp that fast intentions does. Again, this has been discussed and dyno proven in the past. I'm not saying the NISMO exhaust is horrible; it's well made and does perform better than stock. What I am saying is that for the money spent there are better options. My stock NISMO exhaust is hanging in my garage while my fast intentions is on my car. Sounds better, lighter, and performs better.
Remember, the NISMO exhaust isn't the only thing giving the NISMO extra power, there is also a better tune and higher rev limit. Those who did the swap but in 2009 when the car first came out only say 7-8hp gains on a stock regular 370z.
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