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      04-27-2010, 11:05 PM   #3
Private First Class
Drives: 2011 1M & 2011 X5M
Join Date: Feb 2010
Location: Charlotte, NC

Posts: 123
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Originally Posted by Jesal@Project 808 View Post
Whoa what a difference.

How did they do it?

I had two DMH electric cutout valves installed right after the x-pipe effectivly eliminating the stock muffler.

Them I instlled AA's X-pipe with HFC's. I am still using my stock muffler but with a push of a button I can bypass the mufflers and run throught he AA X-pipe only! It's pretty awesome but loud when the valves are open! With them closed it's deffinatley louder than stock but totaly acceptable for daily driving.
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