Will this scrape on steep inclines or speed bumps?

The two-piece design sits integrated with the rear bumper line, so clearance depends on your suspension height and approach angle. Verify fitment with your current setup before installation. If you run lowered suspension, test fit at a safe angle to confirm ground clearance matches your driving habits.

Does this provide functional downforce or is it mostly cosmetic?

GTR-style diffusers enhance rear-end visual aggression and add subtle aerodynamic flow channeling at highway speeds. This is not a race-tuned wing—expect visual impact and modest air management rather than measurable track-level downforce. Real-world benefit scales with speed and driving conditions.

How do I protect the carbon fiber finish long-term?

Carbon fiber is durable but benefits from UV protection. After installation, lightly sand and apply a quality clear coat before exposure to direct sunlight. This guards against UV fade and weather oxidation. Once protected, routine car wash maintenance keeps it looking sharp for years.