So I just did the swap. Not too hard, but I might be retarded. I was roughing up the exhaust a little too much trying to get it off and fucked the threads on one of the studs. Had to beat it off and replace it with one of the studs that are on the AT exhaust.
I got the full AT exhaust setup for 250$, and if you are creative, you can fit the entire thing in the Z cabin space.
One of the best things is that the sound is much deeper/throatier. When you listen to videos on the net, you don't hear that "throaty" sound that this setup actually has. Can't wait to cold start it tomorrow morning to see how loud she gets lol.
Another tip, is to just unbolt the exhaust hangers. It's not worth trying to take it off via the rubber. GL to anyone who wants to attempt it also.
Drop the muffler with the hangers, and work on it on a bench. Use some silicone tire slick stuff. Spray the hanger shaft and the rubber hanger. A pair of channel locks are your friend; With them wide open, one end on the tip of the hanger, and the other on the back side of the rubber. Pops/slides right off.
Yes, Full AT exhaust fits IN the Z. Its how I picked mine up.