Do I need to modify the core support or any mounting points to install this?

No. This grille uses your factory attachment points—no drilling, cutting, or brackets needed. Bolt it straight in place of the OEM grille.

How do the LED lights connect to my car's electrical system?

The harness plugs into your vehicle's existing daytime running light circuit or marker light wiring. No new power source required if your Mustang is equipped with factory DRL capability; consult your owner's manual for exact connection point.

Does this grille require primer or paint before installation?

The finish is ready to install as-shipped. If you want a custom color match, you can prep and paint it before mounting—just allow cure time before handling. Stock finish can go straight on.