California's Air Resources Board requires aftermarket emission parts, such as your Ford F-150's aftermarket air intake unit, to possess an EO (Executive Order) number when being installed on a vehicle intended to be used on California public roadways.
Simply replacing an EO tag to match a required aftermarket emission component when the EO tag does not belong to that component, in a best case scenario, is considered an "emissions tamper"... worst case, smog check fraud.
Aftermarket air intake units are designed and approved by CARB after extensive laboratory research. Components not approved by ARB or approved by ARB but not for the vehicle the component is being installed on, will cause a smog check failure.
