Will the diffuser interfere with the OEM exhaust or rear bumper cutouts?

The diffuser is designed as an add-on that mounts below the existing rear body line. Before you install, visually confirm the mounting points align with your car's current bumper assembly. If you've modified the exhaust or bumper previously, test-fit the diffuser first to check clearance at the tailpipe exits and body clips.

Should I use adhesive, fasteners, or a combination to mount this?

This is a bolt-on diffuser—use fasteners at the factory mounting points on the rear body. Adhesive alone is not recommended for a two-piece panel that carries road debris and vibration. Bolting ensures stability at highway speeds and allows removal if needed for service or replacement.

Does the carbon fiber need protection from UV or salt exposure?

The clear coat provides baseline UV protection, but carbon fiber and resin can degrade over time in direct sunlight or harsh climates. A good car cover when parked long-term, or regular detailing with UV-protective wax, will extend the weave's appearance. In coastal areas, rinse the underside after drives to prevent salt buildup in the weave texture.