Hmm... A Varex muffler without the butterfly valve.. is not a varex muffler then ? =/ unless the previous owner removed the valve system from the muffler... But then again I don't see why on earth you would want to do that.

I can imagine it being alot cheaper just to buy a whole new varex muffler.. rather then paying for someone to install one in your muffler.. =/ anyways I have a Varex Cannon, and I highly recommend it. Go all Ninja when I see Five O drive by