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      10-12-2012, 03:02 PM   #8
guentherkapp
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Drives: 2010 E93 M3
Join Date: Feb 2011
Location: USA

Posts: 38
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Have you done the OEM mod with the test pipe?
No I have not and I am not sure whether this is a good idea, because of the sound effects.
There is also a separate thread called “OEM mod + Catless” on this subject it think.
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