Will this interfere with my front bumper or brake lights?

No. This lip mounts below the factory bumper and does not extend into the brake light housing. Verify that your vehicle's OEM bumper sits at the standard depth before installation to ensure proper fitment.

Should I use adhesive or drill through for mounting?

This lip uses factory mounting points, so you'll bolt it directly through the existing holes in your bumper support. No adhesive or additional drilling is required — align the panel and secure with fasteners.

How stable is this at highway speeds?

FRP panels are rigid and designed to handle normal driving conditions. Ensure all mounting bolts are tight before driving, and periodically check fasteners after 500 miles to confirm they haven't loosened.