Data and limitations

About this archive

ARB.parts is an independent search interface combining synchronized first-party California ARB catalytic-converter applications with a preserved legacy dataset.

Freshness and provenance

Rows labeled “CARB current source” are retrieved from CARB's official catalytic-converter search and replace overlapping legacy EO records. Current records marked withdrawn or otherwise inactive by CARB retain that status in search results. Rows labeled “Historical archive” are retained when no corresponding current EO is present. The synchronization timestamp is shown on the home page.

Authoritative source

California Air Resources Board data and requirements can change. Always confirm a part and vehicle combination in the official CARB aftermarket catalytic converter database before purchase or installation.

Modernized hosting

The application runs at Cloudflare's edge. Structured search data is stored in D1 and archived documents are served from a private R2 bucket through controlled routes.