how to spot a aftermarket catalytic converter?

Aftermarket cats will usually have markings like N/CA, CA/TA or something similar. Many also have a manufacture date stamped on them (02/06, etc.). Some can be tricky to ID until you get very experienced with handling converters. Then, there are some good OEM cats that look like they would be aftermarket. Some round Nissans and Fords have no heat shields and no numbers or markings from the factory, but they are good OEM cats.



If you're ever unsure on a converter, make sure you're set up with your buyer to text pictures to them for a positive ID. Any good converter buyer will provide this service. That way, you won't get stuck paying good money for a $5 aftermarket, and you will also know that you didn't accidentally buy a good cat as junk.

Originally Posted by SparrowMetals

Aftermarket cats will usually have markings like N/CA, CA/TA or something similar. Many also have a manufacture date stamped on them (02/06, etc.). Some can be tricky to ID until you get very experienced with handling converters. Then, there are some good OEM cats that look like they would be aftermarket. Some round Nissans and Fords have no heat shields and no numbers or markings from the factory, but they are good OEM cats.

Funny you say that Sparrow, but yesterday I scrapped a '97 Ford Cougar XR7 with the 4.6L V8 2 pre and one 3 way cat, they all had the date stamped 06 04 97, thought that was cool. Still got $110 for them. Also they were pretty hard to cut, double wall pipe.

Don't get me wrong I respect your opinion and enjoy your posts, but I am sure they were OEM.