Max possible NA power gain staying legal?
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10-29-2012, 09:28 AM
Drives: 2015 BSM/SO M3
Join Date: Feb 2009
Location: New York
Filter is negligible
I'm not crazy about changing drive pullys
I'm not crazy about catless because of the smell, and carbon emissions.
Pretty much just HFC X-pipe and a Tune...Probably about 20-30 whp.
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