Will this interfere with my trunk seal or rear bumper fitment?

This is a front lip, so it sits on the lower fascia and does not contact the trunk. Once installed and painted, verify clearance to your front fender and bumper edges to ensure alignment with your vehicle's existing panels.

Does this require drilling into the bumper or can I use adhesive?

Installation method depends on your chosen mounting strategy and your vehicle's bumper design. Reference your OEM mounting hole locations and decide between adhesive bonding or hardware fastening based on your setup and durability preference.

How stable is this at highway speed?

FRP lips are lightweight and maintain their profile under normal driving conditions. Ensure all mounting points are secure and flush with the bumper before highway use. Inspect fasteners periodically to confirm they remain tight.