Will this diffuser scrape on steep driveways or inclines?

The grid panel sits within the rear bumper profile and does not extend below the factory bumper line. Check your vehicle's current rear bumper clearance on steep angles — the diffuser mounts in the same plane. If your bumper clears, this diffuser will too.

Does this add functional downforce or is it cosmetic?

This is a cosmetic styling piece paired with functional airflow management. The grid structure helps channel exhaust and rear-end air without generating measurable aerodynamic downforce. It complements the quad exhaust visual and improves underbody flow balance.

What finish do you recommend for carbon fiber protection?

Carbon fiber benefits from a quality clear coat to shield against UV exposure and minor abrasion. Prep the panel surface and apply your chosen automotive clear coat or protective topcoat. This step extends the finish life significantly in direct sunlight.