50-STATE LEGAL: All products with this icon currently have a California Air Resources Board (C.A.R.B.) Executive Order (E.O.) number. They meet the emission standard for use on pollution controlled vehicles in all of the 50 United States for the vehicles listed on the E.O.
FOR RACING USE ONLY: All products with this icon are intended to be used on vehicles that are exclusively designated for racing use only. They are not legal for use on vehicles that are registered for street use.
FOR USE ON PRE-POLLUTION CONTROLLED VEHICLES (PPCV): All products with this icon are legal for use on pre-pollution controlled vehicles. They can be used on all vehicles that were manufactured before emissions control regulations were imposed. These vehicles are considered "uncontrolled vehicles."
Uncontrolled vehicles are defined as...
1965 and older U.S. manufactured California Certified vehicles
1967 and older U.S. manufactured Federally Certified vehicles
1967 and older Foreign manufactured vehicles
STOCK REPLACEMENT PART: All products with this icon are manufactured to exact specifications of the Original Equipment (O.E.) part. They must be used on the specific year, make and model for which it is listed.
ENGINE SWAPS: All products with this icon are intended to be used with engines that have been transplanted or swapped into an uncontrolled or pre-pollution controlled vehicle, as defined above. They are not legal for use on pollution controlled vehicles.