I would say yes, Nismo exhaust is not much better than the base Z exhaust. Aftermarket exhaust will make your Z sound more aggressive and definitely give you gains over the Nismo exhaust.
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2010 370Z 40 Anniv., 6 MT | Fast Intentions | Swift Springs | SPC | Z1Motorsports | JWM | Redline Oils | 35% Window Tint
2015 Mazda6 | 370ZChicago: Chicago Area Cars & Coffee
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