In the exhaust system between the exhaust manifold(s) and the muffler.
A Catalytic Converter is used to clean the fumes of the exhaust emmisions coming out of a motorised vehicle.
As long as the vehicle is kept in good running order the catalytic converter should last the life of the vehicle.
A vehicle that is supposed to have a catalytic converter and it is missing or repaired will run with higher pollution output.
That would depend on the type of vehicle. If it is a low emissions vehicle you have to go with the oem catalytic converter.
It is illegal to remove the catalytic converter from any vehicle.
It is illegal to remove a catalytic converter from any road vehicle.
If you're referring to removing the catalytic converter from your vehicle, first off this is illegal. Secondly no modern engine will run properly with the catalytic converter removed. You must have a fully functional catalytic converter in place.
On any vehicle that came from the factory with a converter installed.
Crawl under the vehicle and follow the exhaust pipe from the engine rearward. You will run into the catalytic converter.
If the vehicle came from the factory with a catalytic converter installed it is illegal to remove the converter. Also, modern engines will not run properly with the converter removed.
If the vehicle came from the factory with a catalytic converter is illegal to remove it. It will also not run properly without the catalytic converter install.
No, it will not run properly with the converter removed. Besides it is illegal to remove the converter from any vehicle.