Admittedly an AI overview but it makes sense.
Yes, a new catalytic converter needs a proper break-in, often involving a specific driving cycle or heat-up/cool-down period, to seat the internal matting correctly and allow the car's OBD-II monitors to reset, which is crucial for passing emissions tests and ensuring it functions optimally to meet regulations. Failing to do the break-in can lead to reduced flow, premature failure, or issues setting the readiness monitors needed for inspection.
| 
