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      10-31-2012, 09:16 AM   #4
CombatNinja
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Drives: e91 328i, e90 328i, e90 335i
Join Date: Feb 2011
Location: United States

Posts: 1,587
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Potential downsides: constant CEL, cat efficiency codes stored, smog test hassles, warranty issues, unburnt fuel odors, and noise.

Upsides, quicker spoolup and more pow-ah.
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