Will this diffuser scrape on driveways or parking lot inclines?

Diffuser depth is designed to sit flush with the M Sport bumper line. Check your bumper's ride height and test approach angles on your driveway before committing to a permanent finish. Most owners report no scrape issues on typical inclines, but extreme lowering setups may need verification.

Does this diffuser add downforce or is it purely cosmetic?

This is a styling piece that matches the M Tech bumper aesthetic. At street speeds, aerodynamic gains are minimal. Track or road-course drivers will see no measurable performance benefit; it's visual integration with the M Sport package.

What prep and finish should I apply before installation?

Sand the surface and apply your chosen topcoat system — urethane paint, epoxy primer, or single-stage depending on your finish preference. Refer to your paint supplier's prep guidelines for FRP. Once cured, bolt to the M Sport bumper assembly using the factory mounting points.