i have a 94 5.0 i have shorty eaders with flowmasters, i want to put an offroad x-pipe on her but i was wondering about the lack of cats affecting the o2 sensors.

 

Unless you run MIL Eliminators or have a tune turn off the rear O2's you will throw a check engine light. It wont be anything major, if you read the code it will say failed cats.

If you have LT's on there I would just get a tune and have them disable the O2's. Youll pull more HP out of your mods that way.