Do these mount at factory locations, or do I need to drill?

These mount at factory rocker points — no drilling or modification needed. Everything lines up to the OEM openings.

The switch is included, but how does it wire into my dash?

The harness connects to your existing electrical system at the engine bay. For exact routing to your dash switch location, refer to your vehicle's service manual — wiring locations vary.

What if a bulb burns out after I install these?

The H11 bulbs are standard replacements — any auto parts store carries them. You can swap them without removing the entire light assembly.