I had the 5zigen fireball and imo it was a nice sound, not too farting loud and barely audible at idle. I think its one of the better ones out there with the straight thru design.
As for that quote above, Man thats the gheyest thing i've seen in awhile. . .at least Bumnah wasn't being a stupid sheep like everyone else and stuck to his guns. I love loud exhaust and I'm not afraid to say it, as long as its not a bad loud like open cats or excessive farting noise. . .a nice loud deep noise is always nice. I guess loud exhaust means rice on this board. . . .then again what isnt rice on this board, just about everything except stock. . .which defeats the purpose of even starting modding boards like this to begin with.