Does anybody have the single race greddy exhaust, how do you like it and does it only come in titanium?

I have the nismo but I think I want the single look, I'm not happy with the nismo so I think it's time for a change, not sure if I should sell it or just keep it, What is it worth used? and I'm going with the greddy tt also.
So hopefully it will give me some good numbers. Also is it cat back or Y pipe back? Will it bolt up to my jic Y pipe if it only comes Y pipe back.