Does this cover bolt to the factory bumper or the frame?

This mounts at factory points on your truck's rear structure. No drilling required—use the existing holes and fasteners that came with your truck.

Will this work with a tonneau cover or bed rack?

The bumper sits below bed-mounted accessories, so tonneau covers and racks shouldn't interfere. Test clearance with any existing equipment before final installation.

Is this a left-only piece?

Yes—this is the driver side only. If you need both sides, order the right-side bumper cover separately.