Will this diffuser scrape on driveway inclines or speed bumps?

The three-piece design allows you to position each section for clearance based on your suspension height and driving style. Check ground clearance with your vehicle loaded before final installation to ensure the rear-most piece sits safely above typical obstacles.

Is this a functional diffuser or purely cosmetic?

This is a styling piece. It follows the VRS visual aesthetic but does not incorporate aerodynamic ducting or vortex generators. Install it for aggressive rear presence, not airflow management.

What prep work does FRP require before painting?

Sand the surface with appropriate grit to create a smooth base for your chosen topcoat system. Work with your paint supplier to confirm primer and clear coat compatibility with FRP substrates, as products vary.