Yes, it is a federal requirement on all cars built since the mid 1970's.
Not unless it was originally equipped with a catalytic converter which is unlikely. If not, then NO it is not required.
It is a federal law that catalytic converters are required on all cars built after 1975
1975?
They must be replaced.They must be replaced.
If it was built with one, it is required.
19751975
19751975
1975 and later.
There are 4. 2 upstraem of the catalytic converts, left and right, and 2 downstream. There are also 2 catalytic converters.
4 though only the front ones are monitored for efficiency
No.
It is required by the federal government.