It doesn't seem much louder than a stock pipe, isn't as stupid and ugly looking as the Sito -appears to be very well made, despite the fact that it is made in some Asian country. If it wasn't made there, it would probably have to cost a lot more. So this is not a complaint :)
I am running it on a px200efl motor, with a drilled airfilter, and no other modifications. At present I am using a 120 main jet, however my fuel system is having some (unrelated) issues. So I can't get my fuel mixure as precise as I'd like.
So, in summary -it makes my bike (that has a huge windshield) go quite well. My response to Toni, (SIP-Man) 8ball on my arm, not in my pants?!?! You guys have a great way with words -keep up the good work!