Will this interfere with the trunk seal or lower bumper edge?

No. The OEM profile is designed to clear the bumper geometry and factory seals. Verify the lip sits flush against your bumper before final installation—check for any gaps or contact points at the corners.

Should I use adhesive or drill through the bumper to mount this?

That depends on your install preference and bumper condition. Adhesive allows a cleaner look with no new holes; drilling offers a more permanent mechanical bond. Both methods work with carbon fiber—sand the mounting surface and follow your chosen fastening method's specs.

Does carbon fiber stay stable at highway speeds?

Yes. Real carbon fiber is rigid and won't flex or rattle at speed. Mount it securely and verify all fasteners are tight before your first drive. The hand-laid construction ensures structural integrity once properly installed.