For what it's worth, your Fiesta ST also does not have to smog for a full six years from new. We've also dropped our price on the Injen Intake and exhaust even lower over here, lowest price on the Injen anywhere.
IIRC, this intake is back on my Fiesta and I believe it is CARB E/O pending, like most of the other intakes for Fiesta ST. I do not think ANY of the intakes for the Fiesta ST have a CARB E/O at this time.
Also, for what it's worth, since the system leaves the EGR and PCV system intact, you should also be good on smog.