Will this bracket work with my aftermarket front bumper?

This bracket is designed around factory mounting points on your 300. If your bumper uses non-standard attachment, test-fit the bracket against your bumper before permanent install to confirm clearance and alignment.

Do I need to prep or paint this before installing it?

The bracket ships ready to bolt on as-is. If you want to match your vehicle's finish or protect against corrosion long-term, light sanding and a coat of spray paint will give you the result you're after.

What fasteners do I need to bolt this on?

The bracket uses your vehicle's factory mounting holes and existing fasteners. Verify your hardware is present and in good condition before install—replacement bolts are readily available at any hardware store if needed.