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      11-16-2012, 04:50 PM   #4
Mike@N54Tuning.com
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Drives: 2007 335i, 2015 M3
Join Date: Dec 2008
Location: N54tuning.com

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Rather than spending the money on a dyno you should spend it on a mechanic to fix the car. 30FF is boost leak. Since you bought the JB4 used it could just be damaged or something as well.

Mike