Will these mount at the factory fog light location without drilling?

Yes — these are designed for factory mounting points on your Tundra. No drilling or frame modification needed. Test-fit before final fastening to confirm alignment.

Do I need to splice into my truck's wiring?

No. The harness uses OEM-style connectors that plug into the vehicle's existing fog light circuit. If your truck didn't come with fogs from the factory, you may need to run the harness through the engine bay — trace the routing before committing to fasteners.

What bulbs do these use, and are replacements included?

The assembly uses standard automotive fog light bulbs. Bulbs are not included in this kit — you'll source them separately based on the socket type confirmed during installation.