Will this diffuser scrape on steep driveways or inclines?

The AutoBahn diffuser hangs below the bumper line, so confirm clearance at your driveway's approach angle before final installation. Test fit and mark any contact points on the undertray. Sand and adjust as needed, or consider a small lip protector if ground clearance is tight at your location.

Is this diffuser functional or purely cosmetic?

This is a styling-focused undertray that mimics performance diffuser aesthetics. While the louvered design references aerodynamic principles, treat it as a visual upgrade rather than a downforce generator. It complements the stance and rear-end presence without adding measurable performance benefit.

What prep work does FRP need before painting?

Sand the surface with appropriate grit to promote paint adhesion, then clean off all dust. Apply your chosen primer and paint system per the manufacturer's instructions. FRP accepts most automotive finishes well once properly prepped. For best results, reference your paint supplier's FRP-specific recommendations.