Will this lip interfere with my trunk seal or undercarriage at speed?

No. The air dam is designed to sit cleanly below the factory bumper line without contacting trunk seals or suspension components. Verify clearance with your vehicle's existing undercarriage setup before final installation.

Do I need to drill holes to mount this, or does it use adhesive?

This lip is designed to integrate with factory mounting points on the front bumper assembly. Review your vehicle's bumper attachment method to determine whether you'll use existing holes or apply construction adhesive in conjunction with fasteners. Both approaches work depending on your install preference.

How stable is FRP at highway speeds?

FRP offers excellent rigidity and flex resistance for front air dams. Once properly secured and cured, the material maintains its shape through typical driving conditions. Ensure all fasteners are tight and any adhesive has fully set before highway use.