Will I need to modify my lower valance or air dam to fit this bumper?

Check your current lower valance cutout dimensions against the BT-1 profile before final assembly. The bumper aligns with factory mounting points, but your air dam or valance may need minor trimming depending on how it was previously installed. Mock up the fit before committing to any cuts.

Does this bumper have pre-drilled holes for fog lights or bumper sensors?

The BT-1 design includes the profile for standard fog light and sensor positioning, but final hole sizing and placement depend on your specific setup. Reference your vehicle's OEM hole locations before drilling to ensure alignment with your fog assembly and any front-end sensors.

What prep work is needed before painting this bumper?

Sand the primer surface with appropriate grit to establish adhesion, then wipe clean of dust. Follow your paint system's surface preparation steps — the bumper is ready to accept your chosen primer and topcoat once sanded. No additional repairs or filler work should be necessary on a brand new piece.