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JDM3 · 11-22-2010, 11:51 AM

You will not feel or see much more than 5 - 10 hp out of a rear section exhaust. Its for sound mod only. Removing or switching to HFC (primary) and ECU tune gives you noticeable power increases.

11-22-2010, 11:51 AM	#24
JDM3 Major 109 Rep 1,292 Posts Drives: 2009 M3 E92 Join Date: Oct 2010 Location: Long Valley, NJ iTrader: (7)	You will not feel or see much more than 5 - 10 hp out of a rear section exhaust. Its for sound mod only. Removing or switching to HFC (primary) and ECU tune gives you noticeable power increases.
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