Will this diffuser scrape on steep driveways or angled entries?

The Speedster profile extends modestly below the factory bumper line. Test your driveway angles and approach ramps before final installation. Consider your vehicle's suspension height and typical driving routes—low-clearance situations (steep ramps, tall speed bumps) may require approach caution, but normal street and highway use suits this design.

Is this diffuser functional or cosmetic?

This is a styling diffuser. It enhances the rear appearance in the Speedster aesthetic without active aerodynamic function. If you're seeking airflow management or downforce, this piece delivers visual balance at the rear—not measurable performance gains.

What prep do I need before painting?

The FRP surface ships ready for finishing. Sand the primer coat with appropriate grit to create surface profile, then clean thoroughly before applying your basecoat and clearcoat system. Follow your paint manufacturer's guidelines for FRP substrates to ensure adhesion and longevity.