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      07-29-2012, 05:38 PM   #12
ajw45
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Drives: Z4M Coupe
Join Date: Feb 2011
Location: Boston

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Dynamat , a layer of closed cell foam, and the ///m trunk mat helped but the drone and resonance from 2-3k rpm is still crazy. My shop left me a set of earplugs in the ashtray when I picked the car up as a complimentary "sound mod"

My last m5 was cat-less and resonator-less and it was still quieter than this....
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