did you replace them with OEM bulbs?

To take out the headlights without removing the bumper:

1. remove the plastic trim under the headlight by starting at the side closest to the hood and slowly pulling it out as you move to the opposite side

2. there are 4 bolts holding the headlight in place, remove those, but be very careful not to drop the lower ones as they are hard to locate if you do. (also before removing the headlight, mark the location of the upper tabs with tape or something so you know where they go when you put them back in as to not mess with the beam pattern)

3. after the bolts are removed, slowly pull on the headlight and it can be pulled out. i would put a towel on the bumper under the headlight as to not scratch the bumper.

also, depending on whether you have a 3.0 or 4.4/4.6 you will have to remove the air filter (at least i had to since i have the afe intake).

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