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      12-27-2012, 05:16 PM   #57
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Drives: 08 E90 M3, 99 E36 M3 Turbo
Join Date: Feb 2011
Location: Concord, NH

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A set of test pipes does not require much development. It is just a straight pipe bent at the end and fitted with a flange and a couple of 02 bungs. None of them are going to make any more power or any different sound than the others.
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