Check with your dealer. Catalytic Converter is under emissions warrenty for
8 years and 80k miles.

I had Honda absorb the cost of the catalytic converter minus the labor
charge  on my 1998 Honda Accord LX 4CYL. However, I was told that this is
done on a case by case basis. I had 83,000 miles on the car at the time.
Also the car was purchased at a Honda dealership as a certified used car if
that makes any difference.