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      11-09-2012, 04:35 PM   #3
kevin///mlee
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Drives: E90 M3, E30 M3
Join Date: Sep 2012
Location: Bay Area, CA

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Macht Schnell test pipes remove the primary cats and are much cheaper than the x-pipe option. Although a race x-pipe like the challenge one would be much louder as it removes all cats and resonators