Will this diffuser clear the road on steep driveways or parking lot inclines?

The diffuser extends below the factory bumper line, so verify ground clearance with your current suspension setup and driving habits. If you frequently navigate steep inclines, mock-fit or measure the extension against your existing bumper before committing to installation.

Is this purely cosmetic or does it provide functional downforce?

Bltz styling prioritizes appearance over aerodynamic function. This panel enhances the visual line of the rear fascia; don't expect performance-level airflow management. It's designed for clean, aggressive aesthetics.

What prep work is required before painting?

Sand the entire surface with appropriate grit to promote adhesion, then clean thoroughly to remove dust and debris. Reference your paint supplier's prep guidelines for primer and topcoat compatibility with FRP substrates.