RCZ did have one but sold it to me.
Like others have said before the stillen is a good kit with a aftermarket tune and you will make power, maybe not as much as other kits but then again it is all subjective as to what you are wanting. My personal experience is that the stillen gives you the feeling of a stock ride for everyday driving and then when you want it rev it past 4k and you know you have something extra under the hood. I would suggest it to my friends in fact my buddy is in the process of buying one.
