I would expect the laws are more concerned with the untrained, unlegislated
handling of a part laced with heavy metal dust, than the concern for clean
Ozone.
How many knotheads have you watched pounding the element out of a converter
in a cloud of "dust", most likely about the same amount of brake and clutch
dust blowers, I would guess!     :>)

Howard

> I'd take a good used OEM cat over aftermarket.....