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.
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