I've had my STI for almost 2 months and the headlights always seemed way too low, like really scary, things would just pop out in front of me . I brought it to the dealership and they said they were out of adjustment and they "fixed" it. I couldn't notice any difference. So I did it myself.
There's a small white screw with notches above it between the windshield wiper filler and the main headlight, directly in front of the battery, see pic. On the passenger side it is almost underneath the intake but not hard to see. I used some electrical tape to make a mark on the wall to see my adjustment. I would recommend marking your screwdriver so you know how many turns you did. And do the same amount on each side. Counterclockwise raises it. The factory settings have the drivers side lower to prevent blinding oncoming traffic. I turned mine out about 5 full turns and it barely moved on the wall, but when I drove it I could definitely SEE a difference.
Just be carefull not to blind people.