Ok, after looking at the ultra thrust mufflers and MVVS tuned mufflers and Jett Stream mufflers, I think that the plane will look a bit cleaner with just a tuned muffler instead of the long header pipe and long can. I think I am going to try and make a tuned muffler. I just don't think that with the "folded system" would be as efficient as a straight shot like what I am making now. I hear that the tuned mufflers give you quite a boost in power but is it as much as you would get with what I have now?