I haven't found my RENIX TB, yet. My 2000 did a bit better with the JBA exhaust header. Still, hard to tell. I did make it to the Carlise or PA Jeep All Breed Jeep Show. I picked up a used Pace Setter header. It was from a TJ. I'll have to adapter the down pipe or buy one. Overall it looks OK. Its a Tri-Y design. The primaries are dia 1.5, so 1.375 ID. The secondary's are 1.970 OD. The collectors are about 2 inch ID. So, a bit small. It will go on a '98 I am going to sell.
Edit: I looked further at the Pace Setter XJ vs TJ. The XJ has slip fit for the cross over or down pipe. Though two pipes, unlike the older style. The TJ has the ball socket type like the 2000+