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      02-28-2013, 09:03 AM   #2
THE TECH
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Drives: BPMsport 2012 E92 M3
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For the most gains, obviously a straight piped setup is the way. This comes at the detriment of sound. You will get a raspy sound which most don't prefer. To get the most gains and get rid of most of the rasp, you can just do test pipes which eliminate the front set of cats. It really comes down to what's most important to you as well as how much you want to spend.
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