So I've been shopping for a Hyper and wanting to do my own thing as far as the exhaust goes. I stumbled across this full system for the (older) Multi and think it would be great. As a bonus, the front pipe is moved enough so that oil filter access is good. I've heard the same basic system on a viffer and it's got an amazing sound to it.
http://www.staintune.com.au/exhausts...ull_System.htm