Thread: F80 M3 / F82 M4 S55 Tuning
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      01-02-2014, 05:37 PM   #203
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Quote:
Originally Posted by Tiago@VRSF View Post
The S55 is closed deck whereas the N55 is an open deck block, that should be all that really matters for anyone looking for reliability at higher than OEM power levels.
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