If you like the concept of the removable silencer on the Staintunes, you can also consider Sils for your bike. The Sils that are shipped from Carpimoto (www.carpimoto.com
) come with a "db killer" removable silencer. It is essentially the same thing as the Staintune removable silencer.
Sils are available in aluminum, carbon fiber, or titanium.
I run my titanium sils with the db killer installed almost all of the time - the pipes are slightly louder than stock but the overall sound is very much improved from stock. Without the db killers installed, the exhaust is pretty loud (maybe too loud) - but really sweet sounding!
P.S. - the "db killers" are available separately for those of you that may want to retrofit them to your pipes (that is basically what I did).