Will this diffuser scrape on steep inclines or driveways?

Diffusers sit low, so verify ground clearance with your vehicle's suspension setup before installation. If you run lowered springs or coilovers, test approach angles at your typical driveway slope. The mounting points follow OEM bumper locations, so the extension matches factory-style rear panel profiles.

Is this functional downforce or purely cosmetic?

This is a styling piece in the Rega design language. It complements your rear bumper aesthetically. For measurable aerodynamic effect, you'd need a complete undertray or multi-piece aero system—this diffuser adds visual depth without active downforce generation.

What prep is needed before installation?

Sand and prep the mounting surface on your bumper to remove any loose material or oxidation. Ensure fastener holes align with your existing rear panel—if using new hardware, verify compatibility with carbon panel thickness and use stainless steel fasteners to avoid galvanic corrosion where carbon meets metal.