Will this filler work with aftermarket bumpers or only factory bumpers?

This panel is designed for the factory bumper structure. If you're running an aftermarket bumper, measure the mounting points before ordering — alignment may differ.

Do I need to paint this before installation?

The panel ships ready to install. If you want it color-matched to your truck, sand and prime it before painting with your choice of automotive paint.

Are all fasteners included?

Only the filler panel is included. Use stainless or zinc-plated bolts rated for exterior bumper mounting — refer to your vehicle's service manual for torque specs and hardware type.