Heres a few pics of the catalytic converter from a stock exhaust. Back story was a newer rig wouldn't start or ran like crap. Came down to the exhaust. Honda warranted the replacement.
I have one of those in perfect shape from the front flange to the rear oval where it welds to the canister if anybody needs it. (Original weld broke in short time).
I punched mine out a while back it makes the exhaust a little louder, its tough but you can drill,punch,poke,and pry it out with out cutting up your exhaust as it isn't fasten unto the muffler anywhere.