Quote:
Originally Posted by ortiz73ca
What's the difference between the s tune and the one that comes on the Nismo?
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The S-tune has a slightly larger diameter Y-pipe, which I can tell you from experience is prone to cracking, and made about 1-3 whp throughout the rev range (search through my proven power dyno thread for details and lots of commentary).
The "take off" has a H-pipe, which appears to greatly outperform the S-tune version.
For further commentary, comparison dynos, detailed reports, see the aforementioned thread -- easy to search for.
In short: I would NOT spend the money on the S-tune, even used; buy a Nismo OEM take off for better results.
I have no special opinion on the sound difference -- they both sound fine. Louder than stock, but not enough to wake the neighbors.