Do I need to remove the bumper cover to install this?

Yes. This reinforcement bar sits behind the bumper cover, so you'll need to take the cover off first, unbolt the old bar, and secure this one in its place using the factory attachment points.

Will this work with an aftermarket bumper?

This bar is built to OEM specs and mounts at factory points. If your aftermarket bumper uses the same mounting structure, you're good. If it doesn't, test-fit before final fastening.

Is this bare or primed?

Product finish is not specified. Inspect on arrival and prep accordingly before installation — bare metal may need primer or paint protection depending on storage conditions.