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      08-06-2012, 01:52 PM   #6
speeding.rocket
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Drives: 2009 M3 E90 6MT AW
Join Date: Jan 2011
Location: Southern California

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Which OEM mod was this? 1) Bypass the exhaust; or 2) opening the middle of the exhaust and changing the perforated pipes for solid ones?

And how much was it?
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