The Spyder I bought came with the 5Zigen Fireball exhaust. The sound is hardly noticeable unless at full throttle, but at the cost of having 2 resonators. That won't help performance much, but it keeps it quiet. I think it looks like crap personally.

Also, it was two years old when I got it and it was full of holes. It is not very well made. I would not suggest it.