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      09-01-2017, 01:19 PM   #14
Mvy
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Drives: 2008 E93 M3
Join Date: Nov 2014
Location: GA Peach

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ive often wondered if an improperly mounted felt undertray causes the noise. I have it but only with the top down.
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Harrop Supercharger, BPM Tune, K/W Coil over kit, Stoptek BBK, Magnaflow exhaust, ear to ear grin everytime I drive...
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