Cobb Stage 1+ Power Package w/ v3 - Subaru WRX 2006-2007 / STi 2004-2007 / FXT 2004-2006EMISSIONS 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 17D 660 42 DESCRIPTION Combining the world's best selling, most flexible ECU upgrade solution along with a high flow filter to increase air flow, COBB brings you the COBB Stage 1 Power