Find the Right Converter

How do you determine what universal converter to use?

When installing a universal converter, it must still meet the emission requirements of the vehicle and cannot be chosen by size alone. By looking up your specific vehicle in the catalog or web site, you will find the recommended universal converter with the appropriate loading. If a universal converter is not listed for your specific application, a direct fit must be used; if a direct fit is not listed the only alternative is the Original Equipment Manufacturer (OEM) part.

Can I use a standard universal type converter on a vehicle with a diesel engine?

No. A diesel engine has different emission requirements and a gas engine converter will not function on a diesel engine.

Is my vehicle manufactured for CARB or federal?

The best way to determine this is to look at the vehicle’s emissions system label. The label can usually be found on either the front radiator support, the strut tower plate, or under the engine hood. If the vehicle is California Emissions Certified, the label will reference “CARB,” “California,” or “ARB.” Once the emissions certification has been found, the “Engine Family Number,” or sometimes referred as “Test Group Name,” “Engine Family Code,” or “Group Number” must be determined. This number can be found on the Emissions Control Information Label.

How to identify a California Air Resource Board (CARB)-compliant catalytic converter?

Every CARB-compliant replacement converter must display a certification stamp or label on the converter shell that includes:

  1. CARB Executive Order approval number
  2. Manufacturer Part Number
  3. Date of Manufacture
  4. Exhaust Flow Direction

Identifying the right aftermarket Catalytic Converter for my vehicle:

**It is illegal to install a catalytic converter based solely on physical shape, size, configuration, or pipe diameter.


  1. Vehicle Manufacturer
  2. Vehicle Model
  3. Vehicle Year
  4. Vehicle Specific Engine Size
  5. Vehicle Test Group / Engine Family Number
  6. Visit or California Air Resources Board Aftermarket Converter Database to see which aftermarket part is approved to install.
  7. If no EXACT match is found, then there are no aftermarket catalytic converters available at this time.