Will this diffuser scrape on steep driveways or inclines?

Diffusers sit low, so steep approaches and extreme angles pose scrape risk depending on your suspension height and driveway pitch. Measure the clearance between your current bumper and ground, then compare against your driveway geometry before committing. Adjust your approach angle or lower-suspension setup accordingly.

Does this diffuser add real downforce or is it purely cosmetic?

This is a GT tuning style piece designed for visual impact and airflow management. Whether it generates measurable downforce depends on vehicle speed, bumper design, and suspension tuning. Treat it as part of an overall aerodynamic package rather than a standalone performance upgrade—it looks right and works with your existing rear-end geometry.

What should I do to maintain the carbon fiber finish?

The clear coat protects the weave from UV and minor weather exposure. Wash with mild soap and water, and avoid harsh chemicals or abrasive pads. If the clear coat ever becomes dull or chips, sand and prep the surface before applying your chosen protective finish to prevent oxidation and yellowing.