It is illegal to install a catalytic converter based solely on
physical shape, size, configuration, or pipe diameter.
LOCATING THE ENGINE FAMILY NUMBER (EFN) / TEST GROUP NAME
To determine which catalytic converter to use on a vehicle, it is necessary to determine the specific vehicle emission system that was installed by the Original Equipment Manufacturer. The label can be found in the engine compartment usually on the hood underside, strut tower, radiator support, fan shroud, or firewall. If the label is missing, it is necessary to contact the OE dealer to order a new Emission Control Information Label.
IDENTIFYING CALIFORNIA AFTERMARKET CATALYTIC CONVERTER
Effective January 1, 2009, all new aftermarket catalytic converters sold or installed in California must have the proper labeling. To ensure you are buying, selling or installing a California legal catalytic converter the following label must be visible on the converter. Below is a sample of what to look for.
HOW TO FIND AN AFTERMARKET CATALYTIC CONVERTER FOR A VEHICLE
Visit the link below and enter the Make / Model Year / Model / Engine Size then verify Test Group Name/EFN from the vehicle. If no EXACT match is found, then there are no CARB approved aftermarket catalytic converter available for that vehicle.