Will this interfere with my trunk seal or undercarriage?

The RGR Tune profile is designed with minimal extension, so interference with standard trunk seals is unlikely. Verify fitment against your vehicle's current bumper height and any existing lip modifications before final installation.

Should I glue this or drill through for mounting?

Both methods work depending on your preference and local body lines. Adhesive-only installation is cleaner and reversible; drilling through the factory bumper creates a permanent bond. Test-fit the lip first to confirm alignment, then choose your attachment method based on your setup and desired permanence.

How stable is FRP at highway speeds?

FRP composite is engineered to flex under airflow without cracking or separating. Proper mounting—whether adhesive or fastened—ensures the lip stays secure at speed. Make sure all contact points are fully seated and cured before driving at highway speeds.