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      05-14-2014, 03:15 PM   #9
Jeff@TopGearSolutions
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Drives: C6 Z06, 09 335i, 10 335xi
Join Date: Dec 2008
Location: www.TopGearSolutions.com

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You are better off getting a tune to start. The tune adds way more power then downpipes would, especially donwpipes without a tune. A proper tune will get rid of the CEL also.

You should go catless as the catted options deteriorate over time and don't have the same performance benefits as catless by no accident.
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