cigaro wrote on 12/31/69 at 16:00:11:There's one guy who's posted a long note on the web saying that the Supertrapp he put on added HP and boosted performance. Is this credible?
Oh yeah. I have a Supertrapp and rejetted carb and the bike has significantly more acceleration
It's less cold blooded and is smoother all around. I highly recommend it. I did have to cut off some of the header pipe on mine to achieve a good fit. For this reason the Raask would probably be easiest to install.
I think the two best exhausts are the Supertrapp and the Raask. Both are on the loud side (the Raask is the louder of the two ? - ask Greg, he has both). If you want a mellower sound go with a Harley muffler.
The original muffler is very restrictive. Any aftermarket exhaust will add performance (with a proper rejet).