BMW M3 Forum (E90 E92) - View Single Post - Max possible NA power gain staying legal?

CSanto · 10-29-2012, 08:28 AM

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.

10-29-2012, 08:28 AM	#5
CSanto Brigadier General 636 Rep 3,039 Posts Drives: 2015 BSM/SO M3 Join Date: Feb 2009 Location: New York iTrader: (3)	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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