Will this interfere with my trunk seal or undercarriage components?

No. This front lip mounts to the lower fascia and does not extend backward toward the doors or trunk. Verify clearance to your bumper cover at installation by dry-fitting before final fastening.

Can I install this with adhesive, or do I need to drill?

Both methods work. Adhesive bonding is cleaner if your lower fascia surface is clean and smooth; drill-through fastening offers more security in high-vibration environments. Choose based on your preference and the condition of your mounting surface.

Will this stay stable at highway speeds?

Yes. FRP is rigid and lightweight, designed to handle wind loads at speed without flex or rattling when properly secured. Ensure all fastening points are tight and that your mounting surface is clean and dry before installation.