I was thinking about slapping on the Barons Air kit. I know I will have to rejet. The V&H Classic II give my ride a nice low rumble now. It will sound a lot better with better air. I was also considering the Arlen Ness Big Sucker, but I'm concerned it will stick out to far. I'm fortunate to have one of the best bike mechanics around. He did wonders with my 650 custom.