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      01-27-2013, 07:26 PM   #5
Brucewonder
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Drives: 2011 E92 M3 yea boi
Join Date: Nov 2007
Location: Socal

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i had the sosi before as well as the bastuck exhaust but not installed together. If you want it louder but no rasp then i suggest just deleting the 2 secondary cats and leaving the resonators. I had the sosi with the stock exhaust and it had a high rasp over 3K rpm...hope that helps.
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2011.5 E92 ///M3 SSII/FR