Thread: DIY: Golf tee mod / exhaust flapper disable w/ pictures
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      01-24-2015, 05:56 PM   #323
Spin_dry
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Drives: BMW 135i
Join Date: Nov 2014
Location: Wisconsin

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I did this little mod today. I believe BMW added this flapper to prevent hwy drone. At 60-75 mph the car now has a low and annoying drone. Not my thing.
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