oxigen sensor extenders, do they work?

[Augusto]

Hi there, I suspect the cat is somewhat clogged in my 97 expedition, there´s no emissions test or laws here, I am considering removing the cat, and I got this O2 sensor extender, do they really work? I don't like much the idea of having an annoying CEL flashing on my dashboard. Anyone has used them?
Thanks.

 

[Billme]

I would like to know myself

 

[JamaicaJoe]

If your cat is clogged maybe a better solution would be to try to burn it clear with an additive?

 

[Retiredusps]

I PUT ONE ON MY OLD2005 NO LIGHT. YOU CAN GET THEM HERE https://www.cesdeals.com/ OR EBAY SORRY ABOUT CAPS big fingers