Right, they dont do them anymore mainly due to a problem with them breaking.
All it is, is a longer inlet pipe with the filter on, and cause of its length and the charger twisting it caused the welds to break after some time. You could see if you could make the pipe work for inlet longer, but i dont think it will dampen out the sound that much. With that charger, its gonna be loud no matter what you do. But if it is a bbm one you will sell it quite quick if you decide to sell it.
On dubforce there is always someone looking into it, not to mention someone off here would snap it up. I nearly bought the charger off sam, who was the owner who had it all done, when he was gonna break it.
Them chargers can run up to 2 bar of boost and on the g60 engine they can make up to 300bhp.
Would be worth keeping if you wanted to get more power.