Weeeelllllll, yeah, but noise doesn't = HP.
Your statement that loud pipes dont make more power is false to an extent. Twin pipes on any sled will make more power then any single pipe designed or that can be designed. The way you tune an exhaust is by its length and flow diameter. In order to make a single pipe that could perform as well as a twin pipe you would need to extend the length, most chassis dont allow enough room in order to do this. When you use only one pipe for each cylinder you dont need as much length to get the right tune. Before making remarks such as that maybe you should do a little more research.
Also running a turbo on pretty much any 2 stroke eliminates almost all room for a muffler that would be capable of doing anything. And if anyone would like to tell me my turbo doesn't make more power then there single piped quite sled, come ride with me.