Will this interfere with my trunk seal or lower body panels?

The front lip extends from the front fascia only and does not affect trunk sealing or rear panels. Verify that your current bumper trim and lower splitter (if equipped) have adequate ground clearance before installation, as stancing changes may affect lip-to-pavement distance.

Should I drill through or use adhesive to mount this?

This lip mounts to factory fascia attachment points using OEM-style fasteners. Adhesive alone is not recommended for sustained highway speeds. Prepare the mounting surface per your adhesive manufacturer's instructions if you are reinforcing a bolt-on install, and always refer to your vehicle's service manual for fastener specifications.

How stable is this at highway speed?

FRP lips designed to factory attachment geometry remain stable at highway velocity when fastened securely. Inspect all mounting hardware regularly, and ensure the lip is fully seated against the fascia before final tightening. Any gaps or movement during fastening indicate improper alignment—loosen and reset the panel before completing the install.