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      03-21-2013, 09:10 AM   #12
M3Denver
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Drives: 2011 BMW M3
Join Date: Mar 2012
Location: Denver CO

Posts: 423
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Rasp not to to bad with just test pipes however you can notice it at times. I will be putting some resonators on it this week along With overpriced o2 sensor replacement fml! I'll let you know the result.
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