Will this interfere with my trunk seal or rear bumper removal?

The lip is designed to sit below the main bumper line and uses underbody mounting points. Before drilling, verify your vehicle's OEM attachment locations to confirm clearance with your specific setup. If you plan to remove the bumper regularly, test-fit first to ensure the mounting doesn't conflict with your removal process.

Should I use adhesive or drill through the undercarriage?

This piece is engineered for bolt-on installation using factory mounting holes and points. Mechanical fastening is the correct approach — it maintains structural rigidity at speed and allows for future removal without permanent damage. Adhesive alone is not recommended for underbody components that experience flexing and vibration.

Will this stay stable at highway speeds?

Yes. FRP construction is rigid enough for underbody mounting, and factory-point attachment ensures the panel won't vibrate or separate during normal driving. Proper torque on all fasteners and regular inspection of mounting hardware will keep it secure long-term.