Federal, CARB, and what your smog station is actually looking at.
The part that passes in Texas can fail in California. Registration state — not where you buy gas — decides which converter is legal on your vehicle.
Federal / EPA — 45 states
An EPA-compliant converter installed in the original location passes. No Executive Order number is required. CARB-certified parts are still legal here and often preferred by stations that see both standards.
We stock federal parts for out-of-state vehicles and pre-OBDII applications. They stay hidden when your registration requires CARB.
CARB — California, Colorado, Maine, New York
Aftermarket converters need a CARB Executive Order that names your engine family. The EO is stamped on the shell where the smog tech looks for it.
If a part is not legal for your registration state, we do not show it — and we will not sell it to you. That is the compliance guarantee.
Part family — D is an aftermarket catalytic converter.
The approval issued to that manufacturer and part family.
Revision — increments as more engine families are added.
Ready to see what is legal on your vehicle? Find your converter.