: Most professional shops will refuse to install a used catalytic converter because they risk heavy fines for "tampering" with emission systems.
: In the U.S., the primary legitimate reason for a private party or business to buy a used converter is to recycle the precious metals (like platinum and rhodium). can i buy a used catalytic converter
: These are brand new, legal in most states (excluding CA/NY/CO/ME depending on the model), and significantly cheaper than OEM parts. : Most professional shops will refuse to install