Are the bumper sensor holes already cut out?

Yes. The sensor cutouts are pre-drilled and positioned for factory sensor integration. You can mount your OEM sensors directly without additional drilling or modification.

Will this work with the lower valance or air dam?

This bumper cover is designed as a direct replacement at the main fascia level. Compatibility with lower valance components depends on your specific configuration — test-fit against your current setup before committing hardware.

Do I need to prime or paint this before installing?

Not required. The cover can be installed as-is or painted beforehand. If you plan to paint, clean the surface and apply primer according to your chosen topcoat product's instructions before mounting.