to aim, there are two screws in the back of the headlights (can be adjusted w/ a screwdriver). the one next to the projector is the left/right, and the one behind the higbeam is up/down. be careful not to loosen then too much or they may pop out and need to be rethreaded. one of my screws popped out and was never the same. i got an allen wrench and stuck it in the back of it. it seemed to adjust better than those little screws. but uses the screws 1st... lol