Check this exhaust
 

Check this exhaust.
The page is in Norwegian, but google can translate it.
Scroll down on the link, and watch the video.

http://www.dinside.no/843719/lyden-er-halve-opplevelsen

Link to the company: http://www.cobra-sor.de/startseite.p...8&sprache_id=2

whoa! how does that work?

Here is a picture

http://www.media.allerinternett.no/p...&ee=1275309776

Very interesting