see
tailgunner website
For the muffler.
People love it and I like the sound of it. The theory behind it is pretty simple.
A straight pipe increases your HP on top end but you lose HP on the bottom end because there is no back pressure. The tailgunner has a turbine fan in the back of a resonator tube. When it is not spinning, it takes more force to turn it, thus applying some back pressure. Once it starts spinning it has momentum that keeps it turning freely, this means nearly no back pressure. Best of both worlds.
Most of the guys on these forums make fun of it, but everyone that sees it in the real world seems to like it. It's quite loud without a baffle.
Here's a view of the tailgunner and the turbo;
[ This message was edited by: dunringil on 2006-11-21 08:02 ]