Will this diffuser scrape on driveways or steep inclines?

The C-Speed profile extends below the rear bumper line. Check ground clearance at your vehicle's lowest approach angle and measure twice before final installation if you frequently navigate steep driveways or loading ramps.

Is this functional downforce or cosmetic styling?

The diffuser profile is styled to suggest aerodynamic design. Real downforce benefit depends on vehicle speed and suspension setup. Install it for the aggressive look — any aero gains are a bonus at street speeds.

What prep work is required before painting?

Sand the surface with appropriate grit to rough up the finish, then clean thoroughly to remove dust. Apply your choice of basecoat and clear coat following your paint supplier's instructions for FRP substrates.