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      02-06-2013, 01:00 PM   #2
kitw's Avatar
Drives: 2015 MW M3/2011 E90 M3
Join Date: Jun 2007
Location: Bay Area, CA

Posts: 2,320
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Have used with Challenge Sport and turner test pipes, it works fine and still sounds cool. It won't be as high pitched as the F1, tho.
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