Will this scrape on speed bumps or steep driveways?

Rear diffusers sit lower than the stock bumper and can contact aggressive approach angles. Measure your driveway's steepest transition point and compare it to your current ride height—this will tell you whether additional clearance is needed. Lowered vehicles should verify ground clearance before installation.

Is this functional or just cosmetic?

The AutoBahn profile is styled after racing diffuser geometry and does generate downforce at track speeds. At street speeds, it serves primarily as aesthetic enhancement while reducing turbulence behind the rear axle. Performance gains depend on vehicle speed and aerodynamic setup.

Does this need clear coat protection?

Real carbon fiber benefits from UV-protective clear coat to preserve the weave finish and prevent oxidation over time. Bare carbon will gradually dull with sun exposure. Apply your choice of automotive clear coat before installation, or have it professionally finished for best results.