Do these require any wiring changes to my factory harness?

No. These bolt straight into the existing mounting points and use the factory harness connectors — plug-and-play with zero rewiring needed.

Will I need to adjust the headlight aim after installation?

Yes. After bolt-down, run a quick vertical and horizontal aim check at a wall or alignment shop. Projector optics are more sensitive to angle than reflector housings.

Can I paint or refinish the black housing if I want a different color?

The gloss black finish is baked on. Refinishing requires light scuffing and automotive-grade paint or dip — test on a small area first to confirm adhesion.