Well today I finally got a hold of a used 88 civic EF cat converter for my 90 crx si and had it installed. The cat didn't seem burned out inside and it had about 240, 000km's it when I purchased it.

The car seems to have more low end torque but has lost a little high end power.

More importantly however, is how do I know if the cat is still working properly?

There isn't any burning/rotten eggs smell which is good and the exhaust doesn't smell nearly as bad as it used to without a cat.

What is the average life of a honda cat converter?
Thanks

 

well my 88 had a stock cat until it hit the junkyard last winter. i have no idea how much use my current one has. the guy before me replaced his set-up with stock before he sold it to me.