Do I need to pull my bumper or remove anything to install these?

No. These bolt directly to factory mounting points behind the bumper. You'll need to pop the bumper fasteners or remove trim clips for access, but no drilling or modification of your car's structure.

Will I need new bulbs, or do these work with my existing ones?

Bulbs are not included. Your current bulb type and socket configuration remain the same—these housings are designed to accept them directly.

Can I return these if they don't fit right when they arrive?

Test-fit before final installation. Because these are bolt-on units with factory anchor points, fitment is predictable, but your specific car's trim level or prior damage may affect how they seat. Reach out to support if there's a gap or misalignment once you dry-fit them.