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E90 Supersprint Exhaust
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12-17-2012, 06:14 PM
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m3an
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Most gains are from the front cats being removed; most mufflers only add a few HP if any; check the link below from Supersprint
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m3an
Dynos from Supersprint>>>>>>>
http://www.supersprint.com/en/prod-p...093E280BA.aspx
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