Exhaust system question

[S.A.cowboy]

Hello all.

I hope that I am not cluttering up your board and posting out of place but hope you can help me really quickly. I read a couple months ago on an internet site about some exhaust pipes that were switchable between baffled and straight piped through the press of a button on the handle bar. That way it would be quiet in a neighborhood and loud on the freeway.

If someone could tell me who the manufacturer is I would really appreciate it.

Thanks,
SA