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      10-09-2018, 12:44 PM   #20
crogers
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Drives: 2011 M3 ZCP 6MT
Join Date: Jun 2016
Location: Newport Beach CA

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I heard the reason the muffler was so big on the e9x M3 was to limit the wind resistance on the diffuser/bumper at high speed. Could this be a similar idea? Either way I would remove it.
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