WeponR want lot of money for this outfit. I think you could make your own for a lot cheaper. Go to a metal fabrication shop and ask them to make a replacement for the rubber hose. Go to your local speed shop and buy two adaptor to connect the new pipe to the aircan at one end and to the throttle body. Buy another aircan and hack the crap out of it, or cut the can and buy one before the next winter, this is what I did last year...
I don't have a metal pipe yet, but it is in the spring project...
I guess that it sounds pretty good when you hit RPM limiting with a metal intake pipe.
The metal tube acts as pipe organ to amplify the wa wa wa. ;~)

Ghislain