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

No. The grille mounts independently at the factory points ahead of the bumper. You can unbolt the old grille and bolt this one in place without touching the bumper or hood.

Will this grille need paint or primer before installation?

The grille arrives unfinished. If your truck is black or another specific color, plan to prime and paint it to match before or after installation—whichever works for your workflow.

What hardware comes with this assembly?

The grille assembly ships as-is. You'll use the existing bolts from your old grille to secure this one at the factory mounting points. If those bolts are damaged, have replacements on hand.