Will this lip interfere with the factory front bumper seal?

No. This lip is designed to mount flush with the OEM bumper line and does not compress or disrupt the factory seal. Verify that your bumper is in original condition before installation to ensure proper alignment.

Should I use adhesive or drill through the mounting points?

Both methods work depending on your preference. Adhesive offers a cleaner install with no holes; drilling provides permanent mechanical security. Clean and degrease all mounting surfaces thoroughly before committing to either method, and allow adhesive to cure for 24 hours if you go that route.

Is the carbon fiber stable at highway speeds?

Yes. The carbon fiber construction is rigid and hand-laid for strength. Once properly mounted, it will not flex or rattle. Ensure all mounting points are tight and secure, and periodically check fasteners after the first 500 miles of driving to confirm they have not loosened.