Old thread, but I'm still around. The Y-pipe I used originally came form the exhaust shop that installed the 2-1 system. I was never really happy with that setup. When I rebuilt the car a couple years ago I went to a full 3" dual exhaust that is completely custom. I built my own x-pipe for it. Here are a few pics of the current exhaust setup. Sorry I can't help more on the y-pipe.

 

Man that looks awesome!