No ill effects I could tell. The car actually pulls much stronger in the mid range so the increase in power is apparent going from stock y-pipe to a larger diameter Y-pipe. I should mention that I started with Art pipe and Nismo exhaust (Nismo S-tune mid pipe) before swapping out the stock nismo Y to the XYZ y-pipe.
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Last edited by Zbrah; 05-26-2016 at 11:36 AM.
Reason: Add Nismo s-tune y pipe
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