Will this interfere with my trunk seal or hood latch?

No. This front lip sits at the bumper line and does not interact with hood or trunk components. Verify clearance with your bumper before final installation if you've modified the front end.

Can I use adhesive instead of drilling through the bumper?

Yes. FRP accepts both adhesive and mechanical fastening. Surface prep is critical either way — sand and clean the mounting surface thoroughly before committing to your chosen method.

Does this hold up to highway speeds without vibration?

FRP is rigid once cured and properly secured. Verify all mounting points are tight during installation and after your first few drives. Check fasteners periodically for any movement.