I am getting this chamber (not the whole pipe setup) from Motoine Racing in Japan. It is made for the SXR and new X2. They also have a titanium version, and Bun makes a carbon version too. The titanium one weighs a mere 800g. RPMs are comparative to the FP dry pipe. Any of those Japanese products you can purchase through Ardath, Inc in California. I have a few items in transit right now.
For all you 750X2 guys, this is the chamber for you!
Use this link to see more Motoine Racing products:
http://translate.googleusercontent....le.com&usg=ALkJrhglejIdnZHeoHTeoEgR3ytn2nKUGQ