The Stillen is probably around 10 hp over stock base exhaust. It would be even less than that compared to the stock Nismo exhaust. A performance gain of 10 hp is not noticeable on the Z.
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2011 370Z 6MT Sport Gun Metallic | ARC | CJM | Ecutek | FI | Fujimura | R2C | SPL | Stillen | TWM | Z1 | ZSpeed |
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