Will this diffuser scrape on steep driveways or inclines?

Rear diffusers sit at the lower rear bumper line, so ground clearance depends on your vehicle's ride height and how far the panel extends. Measure your current bumper-to-ground clearance, then verify the diffuser depth against your typical approach angles before installation.

Is this functional downforce or purely cosmetic?

The 3DS design delivers visual aggression and subtle aerodynamic character. For real downforce performance, consult your vehicle's aerodynamic data and track testing — styling diffusers primarily enhance appearance while contributing modest flow management.

What prep work is needed before painting?

Sand and prep the surface before applying your chosen finish. FRP requires proper surface treatment to accept paint evenly — follow your paint supplier's prep guidelines for best results.