A friend runs a noleen on his '04 and loves it. The power delivery is very smooth. The pipe is kinda a lowboy, not as dramatic as my fmf but definately doesn't run the same lines as stock.
I would pick it up, that pipe seems real hard to find. He's got an old school kx500 ice racer that has been trying to buy that pipe off him for a couple years now...he refuses to part with it.
I thought noleen pipes were under the brand name flow now?