Will this interfere with the trunk lid or lower body panels at speed?

No. This lip mounts under the grid bumper and sits low on the underbody, leaving clearance for the trunk and suspension. Verify mounting points on your specific bumper configuration before drilling to confirm alignment with your setup.

Does the grid pattern have to match my bumper exactly?

Yes. This lip is designed for the grid front bumper only. If your vehicle has a different bumper style, this will not align properly. Confirm your bumper is the grid-pattern version before purchasing.

Should I use adhesive or drill mounting holes?

Drilling provides permanent, stable hold for an underbody lip that sees airflow and potential debris. Adhesive alone is not recommended for this application. Reference your vehicle's mounting structure to identify existing hole locations, then drill and use appropriate fasteners to secure the assembly.