Will this diffuser scrape on steep driveways or inclines?

The Vortex profile extends modestly below the factory bumper line. Check ground clearance at your driveway angle and typical approach angles before installation. Most owners clear standard residential inclines without issue, but verify your vehicle's suspension height and typical load before committing.

Is this functional downforce or purely cosmetic?

This is a cosmetic diffuser that complements the lower bumper aesthetic. It does not generate measurable downforce. The Vortex profile directs visual interest and airflow impression without aerodynamic engineering or wind-tunnel validation.

What finish should I apply, and does the carbon weave need protection?

Carbon fiber benefits from a UV-protective clear coat to maintain color and prevent oxidation over time. Sand the surface lightly and apply your chosen automotive-grade clear coat per manufacturer instructions. Many owners leave the raw weave exposed for an authentic look, but clear coat adds longevity in direct sunlight.