Thread: first engine perf/sound mod - CAI or exhaust?
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      07-16-2010, 12:43 PM   #5
Ubermensch
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Drives: white 07 Z4MC
Join Date: Jun 2010
Location: St Louis, MO

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I had this exact question and I'm going with the GruppeM as my first mod. Hopefully it's just another week away from Japan
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