Will this diffuser scrape on steep driveways or parking lot inclines?

Diffusers sit lower than bumper covers, so clearance depends on your vehicle's suspension setup and driveway angle. Measure the ground clearance at your lowest point before final fitment, and adjust downforce angle if needed to match your typical driving conditions.

Is this functional downforce or purely cosmetic?

This is an A Spec style piece designed for visual aggression and track-inspired lines. Actual aerodynamic benefit depends on vehicle speed, body work configuration, and rear wing pairing—this diffuser is most effective as part of a complete aero package.

What prep work is needed before paint?

Sand the surface with appropriate grit to establish adhesion, then wipe clean of dust. Follow your chosen paint system's surface prep requirements—epoxy primer or polyester filler will bond to prepared FRP. Consult your paint supplier's technical data sheet for specific grit and product recommendations.