So I bought a 2000 XJ that had a motor swap done with a 95 4.0. I’ve had jeeps on and off all my life and I wanted a new project so I found this for $550 and pulled the trigger. I want it to be able to pass emmission and get it on the road. It has no down pipe or exhaust system just the header for the 95. So obviously I’m getting codes for 02 sensors and im getting four of them 1/1, 1/2, 2/1, 2/2 since the 00-01 has the 2 cats. I’m going to get a down pipe from a scrap yard and have my buddy weld up an exhaust. My question is how can I get away from all four codes? I’ll only have 1 before the cat since it’s a pre 00 header. Pictures for reference on which header it is.