Will this interfere with the trunk seal or bumper cover?

The Nismo profile is designed to mount cleanly to the existing rear bumper without compressing the trunk seal. Verify that your bumper cover is in good condition before installation, as a warped or damaged OEM cover may create binding points. Minor gap adjustment at the bumper edge is normal and can be closed with trim tape if desired.

Should I use adhesive or drill through the bumper?

FRP lips can be secured with high-strength automotive adhesive or through mechanical fasteners depending on your installation preference. Adhesive offers a cleaner look with no visible holes, while fasteners provide permanent mechanical hold. For adhesive, degrease both surfaces thoroughly before application. For fasteners, locate mounting points on the bumper that avoid sensor cutouts and parking brake light openings.

Will this create drag or instability at highway speeds?

A rear lip spoiler of this size adds minimal aerodynamic load at normal highway speeds. The Nismo design is factory-inspired and matches the proportions of OEM performance variants, so it will not induce noticeable lift or down-force change. Installation should be tight and level to ensure even airflow; gaps or misalignment can introduce wind noise.