I've installed "Random Technology" cats on three different Hondas over the years. Two were because the shell had rusted too much to disassemble when repairing the rest of the exhaust. One was for a failed Cat ECU code. That proceeded to fail again in 6 months. If you get a failed/failing code, that is a symptom of issues upstream that must be fixed first. Often leaking injectors running way rich or bad O2 sensor. Those will clog or burn out the ceramic media.
I have nearly 60K/8years on the current one. Only issue is the shell is starting rust again. Fit was perfect each time.
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