Do I need to remove the rear glass to install this?

No. This louver mounts at factory points on the body—glass stays in place. Confirm mounting orientation before final assembly.

What prep is needed before I paint it?

Light scuff with fine grit sandpaper, then primer. Use standard automotive primer and topcoat matched to your Challenger's factory spec.

Does this affect rear visibility?

The louver is positioned to frame the upper rear window. Sightlines through the glass itself remain clear. Check fitment on your specific vehicle before committing to adhesive or fasteners.