When aftermarket headers are installed, which verification is required before approval?

• A. EPA certification of the headers.
• B. CARB EO number for the headers.
• C. State safety inspection tag.
• D. No verification is required.

Answer: (B)

When a part affects emissions, California relies on CARB approval to ensure it won’t upset the vehicle’s emissions readings. The key verification is the CARB Executive Order (EO) number for the headers. That EO shows CARB has tested and approved the part for use on California vehicles, meaning it’s legal to install and won’t automatically fail emissions testing.

EPA certification isn’t the controlling standard for California vehicles, so it doesn’t fulfill this requirement here. A state safety inspection tag isn’t related to emissions compliance. And saying no verification is needed would ignore California’s rule that emissions-related replacements must be CARB-approved or exempt. Therefore, verify the headers by checking for the CARB EO number on the part or its documentation before approving the installation.