I replaced mine with an aftermarket cat. Not hi-flow or anything just a normal one I picked up for $45 on craigslist. I was told it was good for California emissions and it was cheap so I bought it! I heard read earlier in this thread that too little resistance was bad on a 2.5 so I am happy I got a normal one.
If I can get there I can wheel it!
1993 Ranger 2wd - dd
1999 wranger 2.5 - it gets used for something
1978 international scout - being built
1998 Cherokee sport 4.0 auto
1957 CJ5 - restoring back to stock http://www.jeepforum.com/forum/showt...54#post5168554
Bikes:2000 Ducati Monster 900: 2001 CBR 600 F4i: 1980 CB 900
my build http://www.jeepforum.com/forum/f9/my-build-thread-those-us-low-budgets-550786/