Will this clear my exhaust tips on inclines?

The diffuser sits low on the rear bumper. Check your tip location and ride height before committing to fitment—scrape risk depends on your setup and driving style. Test clearance at full compression if running lowered suspension.

Does this add functional downforce or is it cosmetic?

The RBS profile is styled for visual impact. At street speeds, aerodynamic effect is minimal—this piece works best as part of a cohesive rear bumper and body kit design. Track performance gains are negligible unless paired with full aero tuning.

What should I do to prepare the surface before install?

Sand the mounting surface on both the diffuser and bumper contact points to ensure clean adhesion. Once installed, sand the outer carbon surface lightly and apply your preferred clear coat system for UV protection and durability.