Will this lip interfere with my trunk or undercarriage at speed?

No. The front lip mounts to the front bumper assembly and does not extend into the undercarriage or suspension area. It sits forward of the wheel well and does not affect trunk clearance. Verify ground clearance with your suspension setup before final installation.

Can I use adhesive instead of drilling to mount this, or do I need to drill the bumper?

Factory mounting holes on your bumper are the correct method. Adhesive alone is not recommended for a front lip that experiences airflow and potential road debris impact. Use the existing bolt points on your bumper face for secure, permanent fitment.

Does this lip require any modifications to my factory brake light area?

No modifications to lighting or brake cutouts are needed. The lip sits below and forward of the brake light cluster. Double-check your installation alignment before tightening all fasteners to ensure the pieces sit flush with the bumper contour.