Will this scrape on steep driveways or inclines?

Rear diffusers sit lower than the factory bumper and can contact ground on sharp approach angles. Before installation, verify ground clearance on your vehicle's existing driveway and favorite roads. If ramps, steep parking lots, or off-road entry points are regular stops, test fitment first.

Is this functional downforce or primarily cosmetic?

MSR-spec diffuser fins are designed to work with the vehicle's natural airflow and can provide measurable rear-end stability gains at highway speeds. The styling is aggressive, but the geometry supports real aerodynamic function — not just visual drama.

What prep and finish do you recommend?

Carbon fiber arrives with factory UV-protective clear coat. If the finish will live outdoors, a secondary clear coat layer adds long-term gloss and UV resistance. For best results, sand the mounting surface lightly before installation to ensure clean panel contact and proper sealing.