Will this interfere with my bumper or splitter if I have one already installed?

The lip mounts at factory anchor points and extends minimally from the bumper face. If you have an existing aftermarket splitter or lower diffuser, measure the gap between your current setup and the bumper to confirm clearance before installation. Most owners run this kit solo or paired with a matching splitter from the same line.

Do I need to prep the FRP before painting?

Yes. Sand the surface with appropriate grit sandpaper to scuff the coating, then wipe clean before applying your chosen basecoat and clear. The primer layer bonds your paint properly and seals the FRP weave underneath.

Can this lip handle high-speed highway driving without movement or rattle?

FRP is rigid enough to hold shape at speed when properly fastened at the factory mount points. Tighten all fasteners securely during install and check them after your first few drives. Use threadlocker on fasteners if you plan frequent highway miles to prevent vibration loosening.