Will these fit the factory marker openings without modification?

Yes — these are designed for the OEM mounting points. No drilling, cutting, or bumper modification needed. You're dropping them straight into the existing cutouts.

Do the bulbs and wiring come with these?

The lights ship as hard panel assemblies. Bulbs and harness connections are handled by your existing factory setup — confirm your current bulb type before ordering to make sure you're set.

What's the best way to clean these before install?

Wipe down with a microfiber cloth and mild soap to remove any dust or handling marks. Let them dry completely before fitting them into the bumper to avoid moisture traps.