Car Lambda Sensor Emulator

[Buzzi77]

Good morning everyone. I ordered the 200-cell catalytic converters for the Aston Martin Vantage V8. To prevent the engine emissions warning light from appearing, I bought these.

Car Lambda Sensor Emulator with M18x1.5 Screen Oxygen Sensor Extension Adapter Spacer Extender in Stainless Steel

https://www.amazon.it/gp/aw/d/B0BG65QF4M/ref=ox_sc...

In the various discussions the solution is to intervene on the control unit or buy obd killer. But where I live I don't trust mechanics, I should go far.

Has anyone already tried this solution?
Thank you

[Buzzi77]

I wanted to ask you if it is right to mount all four or not to put those near the engine but only those upstream, that is, in the part far from the engine. From what I have read, if you also mount those near the engine, they negatively affect the reading of the lean / fat gasoline mixture.

Is this a right theory?