Will this lip interfere with my trunk seal or existing bumper clips?

No. The Victory profile is designed to integrate with factory mounting points and existing bumper hardware. Before installation, confirm your bumper clips are in good condition and properly seated — a warped OEM bumper can cause minor contact at the lip edge.

Should I use adhesive or drill through the bumper to secure it?

Both methods work. Factory mounting points allow you to use existing hardware (no drilling required). If you prefer permanent adhesive alone, clean and degrease the mounting surface thoroughly and apply quality automotive adhesive rated for FRP. Most builders use the factory points as primary mounting and add adhesive as secondary support.

How stable is this at highway speed?

FRP lips are rigid under normal highway loads. Secure all mounting points firmly and confirm your bumper isn't flexing excessively — a loose OEM bumper will transmit vibration to the lip. Once locked down, the Victory profile stays planted and won't oscillate or lift.