Hello I need to replace the catalytic converter on my 1990 Prelude. Could you please tell me the size I need to get

 

Thank you very much for allowing me to be a member of Honda-Tech.
Kind Regards, Rich

 

Hello everyone I have a problem with my 1990 Prelude. There is a horrible smell coming from the exhaust, I fitted a new cat-con and it was okay for a day and now the smells returned. I had a look at the ECU and there's no signs of anything being wrong. Has anyone got any ideas what the problem could be? Thank you

 

what does it smell like?
is the motor a b20 or a b21?
Any smoke from the exhaust?
Is the check engine light on?

 

Well he engine is a b20, there is no smoke from the exhaust, the smell is like rotten eggs. The engine has no oil leaks and doesn't burn any oil. I've replace the cat converter, the spark plugs(even though the old ones looked okay and seemed to be burning alright), checked resistance in plug leads, the engine is running smoothly but I am getting poor gas mileage. I've done the tappets and there isn't any leaks in vacuum hoses.There is no engine warning light showing, I've checked the ECU and there are no codes coming up on that. Any ideas what could be causing the smell?