Need help re. Jeep catalytic converter...

Consult a local exhaust guy, As a Ca.guy, don't see a problem with replacing a Ca. catalytic, with a 49 state. ( As long as you are not living in California, I wouldn't sweat it.) I don't think , the catalytic converter is the problem, here. Have you done a OBD 2 scan, for codes yet ? Is the check engine light on, or has been on?. O2 sensors, been changed?