Pulling o2 sensors on my 94 turned into this. I have a 97 down pipe with a cat I am gonna use and move one of the o2 sensors to the exhaust manifold. Have a shop weld me up a pipe after the cat to the muffler and be done.
View attachment 3243146
View attachment 3243147
Here's my plan when the time comes to replace the 02 sensors in my 94:
1. Try to remove the crusty old sensors after soaking for a few days in PB blaster.
2. If there is any difficulty in removal stop and leave them in place.
3. Ditch the PAIR system and install new 02 sensors up there instead. Reroute the 02 sensor wiring as needed.