Does this grille require any drilling or modification to the bumper?

No. This grille attaches at the factory mounting points — no drilling, cutting, or fabrication needed. It bolts straight in where your original grille was.

Will I need to remove my old grille first, or does this replace it completely?

You'll remove the original grille and install this one in its place using the same fastening locations. It's a direct swap.

What tools do I need to install this?

Basic hand tools — typically just sockets and a ratchet to unbolt the old grille and secure the new one. Refer to your vehicle's service manual for fastener specifications.