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      11-29-2012, 12:18 AM   #5
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Drives: 2011 m3
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Originally Posted by gatorfast
I was in the same position as you and decided to remove the secondary cats which ended up being perfect. It added a noticeable increase in volume and a more aggressive sound but still no drone. It does sound a little raspy however so if you hate rasp I would recommend leaving the oem mod alone.
Thanks for the feedback! Do you have sound clip/vid? Would be really interested in hearing that.

Thanks in advance
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