Thread: Berk Technology BWM 135i Full Race Exhaust System REVIEW
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      02-20-2012, 11:27 PM   #8
NC135
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Drives: 2008 135i AW 6MT
Join Date: Feb 2012
Location: Charlotte, NC

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Bringing it back from the dead. I've seen a couple exhausts with a 'balancer tube' to get rid of the french horn sound. Would you recommend doing that? Also, how bad is the drone at highway speeds?
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