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      11-28-2012, 04:28 PM   #2
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Drives: 10' M3
Join Date: Jan 2009
Location: San Diego,CA

Posts: 4,562
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2010 BMW M3  [4.50]
1999 BMW M3  [0.00]
im sure people who have test pipes will chime in but from what i've read the sound is barely any louder and smell is almost non existent. that's all with just test pipes
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