Will this interfere with my trunk seal or brake light fitment?

No. This is a front lip; it does not extend rearward or affect trunk seals, latches, or rear-mounted components. Verify clearance at the front bumper corners before final installation to account for any existing modifications.

Should I use adhesive or drill through to mount it?

This lip bolts to factory mounting points on your existing bumper — no adhesive or new drilling required. Use corrosion-resistant fasteners and verify all connection points are tight before driving.

Does the FRP stay stable at highway speed?

Yes. The rigid FRP core and factory mounting design keep it secure under normal driving conditions. Double-check all fasteners are tight after install and periodically — vibration can loosen hardware over time.