A quick question for the Supertrapp users

It is also interesting that the 500 single guys sometimes put that little inversion cone at the ENTRANCE to the exhaust pipe coming right out of the head. I am going to go and do a dyno pull to see what it does . . . it supposedly keeps the high rpm power in and helps out the low-end torque. Probably a compromise.

The bit is about 1.25 inches long and only drops the diameter of the pipe about .25 inches, but then, of course, the pipe opens up again to its full ID. I'll try and get a pic of it posted here.