I learned a lesson about cheap cat convertors with my Dodge truck. A
shop had the cats advertised for $119 installed. I had one put on and
the truck passed smog, but the when the next smog test cycle after
that came around it failed. I had to have another new cat put on.
The next one I had installed cost $400 plus labor. It remains for me
to find out how long this one will get me through the smog checks.
Longer than the $119 one, I hope.
Your experience may well be reflective of cheap parts quality, but it may
also be reflective of other things. Cats usually hold up - even cheap ones.
That is, unless you have other problems. Engine misfires will eat up cats.
Many people overlook engine misfire codes since they are somewhat transient.
The ramifications of these transients can be expensive though.
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.