Will this require cutting or drilling into the bumper?

Designed for DIY installation with basic hand tools. Test-fit before committing to any fastening method—mounting approach depends on your bumper condition and preference for permanent vs. removable installation.

Does the switch work with the factory wiring harness?

The included switch is designed for OEM-style integration. You'll need to confirm your vehicle's wiring layout and run power from the battery or interior junction—refer to your service manual or a wiring diagram specific to your model year.

Can I replace just one bulb, or do they only come as a pair?

Bulbs are replaceable—pull the old H11 and install a new one individually. The kit ships with both bulbs installed, but you can buy single H11 bulbs from any auto parts store as backups.