Will this scrape on driveway approaches or steep inclines?

The diffuser extends below the rear bumper line, so approach angle and suspension setup matter. Check your current ground clearance and test drive on your typical routes before installation. If you run lowered suspension, measure the gap between your bumper and pavement beforehand.

Does this provide functional downforce or is it cosmetic?

This is a visual enhancement that follows the Hyperion design language. While diffuser-style bodywork can improve airflow separation at speed, real aerodynamic benefit depends on your entire rear-end setup, ride height, and vehicle velocity. Treat it as a styling piece with potential aerodynamic character rather than a downforce guarantee.

How do I protect the carbon fiber finish after installation?

The clear coat provides UV protection, but inspect it regularly for stone chips or road debris. Sand and prep any damaged areas before applying touch-up clear coat. Avoid abrasive car wash brushes on the diffuser and hand-wash or use a soft microfiber cloth to maintain the finish.