I did not remove the headlights and once I got the link to show the rubber boot removed it was a 5 min job for both. I have the Dinan CAI so the carbon fiber intake pipes are close to the bulbs but not half as bad as othe lights like the blinkers... Not sure how tight it would be with the stock air filter box behind it. My adjusters seem OK but I tried to adjust the lights up a little but it really did not move. I searched the forums and was a littl confused as it seems the adjusters are just the little white screws and my gears seem to work but nothing happens. I think I may have damaged them previously taking the light out as I did not know the tiny side marker was connected to the angel eyes bulb. The dealer told me there was a bulb there, but no, it is fiberoptic connected to the angel eyes. My Angel eyes were down as the Umnitza resistor failed. I did not know that was linked to my front running light.... until I took the whole light apart.....