Cobb Subaru Throttle Body Coupler - Subaru WRX 2002-2007 / STi 2004-2021 / FXT 2004-2008EMISSIONS 50 State Legal. This part is legal for sale and use on Emissions Controlled Vehicles in all 50 states when used in accordance with the manufacturer's application guide because it has a California Air Resources Board (CARB) Executive Order (EO) number: D 660 54 WHY? Taken your throttle body coupler off one too many times? Has it seen better days? Why not add a little flair to your engine bay with the new COBB Throttle Body coupler? It's a