I got the magnaflow too. I kept it at 2 inches. It's in the Jeg's castalog for about $20. Get the shorter one (I think it's 17 inches long). I had to cut the end off of the muffler to make it fit right, but thats the only thing needed. It sounds good, not TOO loud though.
89YJ. '97 4.0HO, 4" lift, 33" General Grabbers, Header, no cat, glasspack AR rims