Ensuring your vehicle complies with California’s stringent emission standards is crucial, especially when it comes to catalytic converters in pre-OBDII vehicles. This guide provides essential information and a verification list to help you confirm the correct application of aftermarket catalytic converters, ensuring compliance with California Air Resources Board (CARB) regulations.
Understanding California Emission Standards and Catalytic Converters
California has long been a leader in setting rigorous emission standards to combat air pollution. For vehicles, catalytic converters are a critical component in reducing harmful emissions. Even for pre-OBDII (On-Board Diagnostics II) vehicles, which predate the standardized OBDII system introduced in the mid-1990s, compliance with these standards is mandatory in California.
Aftermarket catalytic converters installed on pre-OBDII vehicles in California must be CARB-compliant. This compliance is validated through CARB Executive Orders (EOs). An EO signifies that a specific aftermarket catalytic converter has been tested and approved by CARB to meet California’s emission standards for specific vehicle applications.
Verifying Catalytic Converter Application with CARB Executive Orders
To ensure you have the correct and legally compliant catalytic converter for your pre-OBDII vehicle in California, you need to verify its CARB EO number. This number is typically stamped directly onto the catalytic converter. You then need to compare this EO number against official CARB lists to confirm its approved application for your vehicle.
This article provides a detailed list of CARB Executive Orders for aftermarket catalytic converters designed for pre-OBDII vehicles. Using this list, you can easily check if the catalytic converter installed on your vehicle, or the one you plan to install, is CARB-compliant and approved for use in California.
How to Use the Verification List
The following table is organized to help you quickly verify the correct application of a catalytic converter. Here’s how to use it:
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Locate the EO Number: Find the Executive Order (EO) number stamped on your catalytic converter. It will typically be in the format “D-XXX-XXX”.
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Match the EO Number in the List: Find the matching EO number in the first column of the table below.
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Verify Vehicle Category: Once you locate the EO number, check the “Category” column. This column indicates the vehicle category for which the catalytic converter is approved. The categories are defined as follows:
- PC-1: Pre-OBDII passenger cars with one catalytic converter per exhaust bank.
- PC-2: Pre-OBDII passenger cars with more than one catalytic converter per exhaust bank.
- T-1: Trucks with one catalytic converter per exhaust bank.
- T-2: Trucks with more than one catalytic converter per exhaust bank.
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Confirm Manufacturer: Finally, check the “Manufacturer” column to confirm the manufacturer of the catalytic converter.
If the EO number from your catalytic converter matches an entry in this list, and the vehicle category aligns with your vehicle type, then the catalytic converter application is correct and CARB-compliant.
California Pre-OBDII Catalytic Converter Verification List
| Executive Order | Series | Category | Manufacturer |
|---|---|---|---|
| D-182-37/12-31-08 | 80600/80700 | T-2 | Walker (DBA Tenneco) (734) 384-7824 |
| D-182-39/11-27-08 | 80400/80200 | PC-2 | Walker (DBA Tenneco) (734) 384-7824 |
| D-182-41/12-24-08 | 80300/80500 | PC-1 | Walker (DBA Tenneco) (734) 384-7824 |
| D-182-46/04-27-09 | 80100 | T-1 | Walker (DBA Tenneco) (734) 384-7824 |
| D-182-54/08-31-12 | 80800 | PC-1 | Walker (DBA Tenneco) (734) 384-7824 |
| D-182-55/08-31-12 | 80900 | T-1 | Walker (DBA Tenneco) (734) 384-7824 |
| D-182-65/11-13-15 | 81100 | PC-1 | Walker (DBA Tenneco) (734) 384-7824 |
| D-182-76/01-18-23 | 81200 | T-1 | Walker (DBA Tenneco) (734) 384-7824 |
| D-182-77/01-20-23 | 81300 | PC-1 | Walker (DBA Tenneco) (734) 384-7824 |
| D-193-84/11-27-08 | 37000/38000 | PC-2 | Car Sound(DBA Magnaflow) (949) 858-5900 |
| D-193-85/12-04-08 | 39000 | T-1 | Car Sound(DBA Magnaflow) (949) 858-5900 |
| D-193-86/11-27-08 | 36000 | PC-1 | Car Sound(DBA Magnaflow) (949) 858-5900 |
| D-193-87/12-17-08 | 33000/34000 | T-2 | Car Sound(DBA Magnaflow) (949) 858-5900 |
| D-193-102/08-22-12 | 337000/338000 | PC-2 | Car Sound(DBA Magnaflow) (949) 858-5900 |
| D-193-104/09-17-12 | 333000/334000 | T-2 | Car Sound(DBA Magnaflow) (949) 858-5900 |
| D-193-105/09-21-12 | 339000 | T-1 | Car Sound(DBA Magnaflow) (949) 858-5900 |
| D-193-109/01-18-13 | 336000 | PC-1 | Car Sound(DBA Magnaflow) (949) 858-5900 |
| D-193-117/03-07-14 | 332000 | PC-1 | Car Sound(DBA Magnaflow) (949) 858-5900 |
| D-193-126/12-29-15 | 352000 | PC-1 | Car Sound(DBA Magnaflow) (949) 858-5900 |
| D-193-127/12-17-15 | 352000/357000 | PC-2 | Car Sound(DBA Magnaflow) (949) 858-5900 |
| D-193-132/ 11-09-2017 | 3391000 | T-1 | Car Sound(DBA Magnaflow) (949) 858-5900 |
| D-193-134/ 01-30-2018 | 332100 | PC-1 | Car Sound(DBA Magnaflow) (949) 858-5900 |
| D-193-149/ 04-05-2021 | 3392000 | T-1 | Car Sound(DBA Magnaflow) (949) 858-5900 |
| D-193-150/ 04-05-2021 | 3322000 | PC-1 | Car Sound(DBA Magnaflow) (949) 858-5900 |
| D-193-158/ 06-10-2024 | 332000 | PC-1 | Car Sound(DBA Magnaflow) (949) 858-5900 |
| D-193-159/ 06-10-2024 | 3321000 | PC-1 | Car Sound(DBA Magnaflow) (949) 858-5900 |
| D-193-160/ 06-10-2024 | 3322000 | PC-1 | Car Sound(DBA Magnaflow) (949) 858-5900 |
| D-193-161/ 06-10-2024 | 333000/334000 | T-2 | Car Sound(DBA Magnaflow) (949) 858-5900 |
| D-193-162/ 07-05-2024 | 337000/338000 | PC-2 | Car Sound(DBA Magnaflow) (949) 858-5900 |
| D-193-163/ 07-05-2024 | 339000 | T-1 | Car Sound(DBA Magnaflow) (949) 858-5900 |
| D-193-164/ 07-05-2024 | 3391000 | T-1 | Car Sound(DBA Magnaflow) (949) 858-5900 |
| D-193-165/ 07-05-2024 | 3392000 | T-1 | Car Sound(DBA Magnaflow) (949) 858-5900 |
| D-193-166/ 07-22-2024 | 352000 | PC-1 | Car Sound(DBA Magnaflow) (949) 858-5900 |
| D-193-167/ 07-25-2024 | 352000/357000 | PC-2 | Car Sound(DBA Magnaflow) (949) 858-5900 |
| D-280-47/12-24-08 | 91000 | T-1 | AirTek, Inc. (DBA Catco) (800) 247-2515 |
| D-280-48/12-23-08 | 66000 | PC-2 | AirTek, Inc. (DBA Catco) (800) 247-2515 |
| D-280-72/12-17-08 | 65000 | PC-1 | AirTek, Inc. (DBA Catco) (800) 247-2515 |
| D-280-80/02-28-09 | 91000 | T-2 | AirTek, Inc. (DBA Catco) (800) 247-2515 |
| D-280-91/04-19-13 | 99000 | T-2 | AirTek, Inc. (DBA Catco) (800) 247-2515 |
| D-280-92/05-03-13 | 84000 | T-2 | AirTek, Inc. (DBA Catco) (800) 247-2515 |
| D-280-93/05-03-13 | 85000 | T-2 | AirTek, Inc. (DBA Catco) (800) 247-2515 |
| D-280-94/05-07-13 | 98000 | T-1 | AirTek, Inc. (DBA Catco) (800) 247-2515 |
| D-280-95/06-13-13 | 83000 | PC-1 | AirTek, Inc. (DBA Catco) (800) 247-2515 |
| D-280-96/06-13-13 | 93000 | PC-2 | AirTek, Inc. (DBA Catco) (800) 247-2515 |
| D-280-97/07-18-13 | 58000 | PC-1 | AirTek, Inc. (DBA Catco) (800) 247-2515 |
| D-280-98/07-18-13 | 88000 | T-1 | AirTek, Inc. (DBA Catco) (800) 247-2515 |
| D-353-47/06-11-09 | 59000 | T-1 | Miller Catalyzer Corporation (888) 744-6006 |
| D-353-62/06-22-09 | 69000 | PC-1 | Miller Catalyzer Corporation (888) 744-6006 |
| D-560-6/05-16-12 | 657800/657900 | T-2 | International Muffler Company (DBA Maremont) (865) 458-4681 |
| D-562-12/01-20-09 | 23000 | T-1 | Valina, Inc. (DBA CarTex) (323) 269-2577 |
| D-562-39/12-16-09 | 21000 | PC-1 | Valina, Inc. (DBA CarTex) (323) 269-2577 |
| D-562-40/12-29-09 | 22000/2600 | PC-2 | Valina, Inc. (DBA CarTex) (323) 269-2577 |
| D-562-42/01-29-10 | 24000/25000 | T-2 | Valina, Inc. (DBA CarTex) (323) 269-2577 |
| D-562-59/08-04-11 | 201000 | PC-1 | Valina, Inc. (DBA CarTex) (323) 269-2577 |
| D-562-60/08-10-11 | 202000/206000 | PC-2 | Valina, Inc. (DBA CarTex) (323) 269-2577 |
| D-562-61/08-15-11 | 203000 | T-1 | Valina, Inc. (DBA CarTex) (323) 269-2577 |
| D-562-62/08-17-11 | 204000/205000 | T-2 | Valina, Inc. (DBA CarTex) (323) 269-2577 |
| D-665-2/02-04-10 | 863000 | T-1 | Eastern Manufacturing, Inc. (215) 702-3600 |
| D-665-3/03-17-10 | 861000 | PC-1 | Eastern Manufacturing, Inc. (215) 702-3600 |
| D-665-13/10-29-12 | 862000/872000 | PC-2 | Eastern Manufacturing, Inc. (215) 702-3600 |
| D-665-19/01-27-14 | 703000/704000T-2 | T-2 | Eastern Manufacturing, Inc. (215) 702-3600 |
| D-724-2/04-07-15 | 18000 | PC-1 | Converter Unlimited, Inc. (714) 933-5200 |
| D-796-2/09-30-21 | 420000 | PC-1 | Advanced Clean Air Technologies Global LLC (231) 437-5000 |
| D-798-1/10-20-17 | 99000 | T-2 | AP Exhaust Holdings, LLC (DBA Catco and Eastern) (800) 247-2515 |
| D-798-2/10-20-17 | 98000 | T-1 | AP Exhaust Holdings, LLC (DBA Catco and Eastern) (800) 247-2515 |
| D-798-3/10-20-17 | 93000 | PC-2 | AP Exhaust Holdings, LLC (DBA Catco and Eastern) (800) 247-2515 |
| D-798-11/05-14-20 | 800000 | PC-1 | AP Exhaust Holdings, LLC (DBA Catco and Eastern) (800) 247-2515 |
Important Inspection Alert for Maremont Catalytic Converters
Please note the following inspection alert regarding catalytic converters manufactured by International Muffler Company (DBA Cherry Bomb/Maremont):
Due to a production labeling issue, some catalytic converters from this manufacturer may have an extra zero added to their Executive Order (E.O.) number on the label. Specifically, when the CARB issued E.O. number ends in a single digit, the label might incorrectly show it as D-560-0X instead of D-560-X. Affected Executive Orders include D-560-3, D-560-5, D-560-6, D-560-7, and D-560-8, which may appear on the converter as D-560-03, D-560-05, D-560-06, D-560-07, and D-560-08 respectively.
This labeling issue does not affect the performance or CARB compliance of these catalytic converters. When verifying these E.O. numbers on the CARB database, do not include the extra “0”. Instead, enter the regular E.O. number (e.g., D-560-3) to access the correct Executive Order information.
International Muffler Company is aware of this issue and is working to correct their labeling process.
Conclusion
Using this guide and verification list, you can confidently determine if the catalytic converter on your pre-OBDII vehicle is CARB-compliant, ensuring you meet California’s emission requirements. Always verify the EO number on your catalytic converter against this list and consult with a qualified automotive technician if you have any doubts or require further assistance. Maintaining a compliant emission system is not only legally required but also contributes to cleaner air quality in California.
