BMW M3 Forum (E90 E92) - View Single Post - Has anyone done a H-Pipe instead of an X-Pipe?

Zaw · 05-17-2012, 11:39 PM

I'm interested to know if these H / X combo mid sections actually make more power or better exhaust flow.

05-17-2012, 11:39 PM	#26
Zaw Private Drives: 2011 E90 M3 DCT Competition Join Date: Aug 2010 Location: Studio City, CA Posts: 97 iTrader: (0)	I'm interested to know if these H / X combo mid sections actually make more power or better exhaust flow.