Will this work with an aftermarket rear bumper or only factory?

This bar is designed around factory attachment geometry. If you're running an aftermarket bumper, test-fit to confirm mounting alignment before final installation.

Do I need to drill any new holes into the vehicle frame?

No. This mounts at factory rocker and frame points—no drilling needed.

What condition does this arrive in—primed, painted, or bare?

Arrives in primer-ready condition. You can paint directly or leave as-is depending on your build. No additional prep required before mounting.