Will this diffuser scrape on steep driveways or inclines?

Rear diffusers add extension at the lower bumper line. Before installation, verify ground clearance at your driveway angle and typical driving routes. Measure the diffuser profile against your vehicle's current rear fascia to confirm fitment for your setup.

Is this diffuser functional or cosmetic?

This is a downforce-style diffuser — the profile is designed to manage airflow at the rear end. It delivers both visual aggression and aerodynamic function. The actual downforce benefit depends on driving speed and your vehicle's suspension geometry.

What should I use to finish this diffuser after purchase?

The diffuser Requires Surface Prep, meaning the FRP surface has been sanded and prepared. Sand and prep the surface lightly before applying your chosen primer and paint finish to match your vehicle's color or achieve a custom look.