Will this interfere with my trunk seal or bumper fitment?

No. This lip bolts to your factory attachment points and adds minimal extension to your lower fascia. Verify clearance with your bumper before final installation, especially if you're running a custom or lowered setup.

Should I use adhesive or drill-through bolts for installation?

Use bolts at the factory mounting points — this is the most secure method and requires no drilling. Adhesive alone is not recommended for a front lip that experiences wind and road debris.

How stable is this at highway speed?

FRP is rigid and designed to handle airflow. At speed, you may notice minor movement if fasteners work loose, so check your bolts after the first 50–100 miles and periodically after that. Proper torque at factory points ensures stability.