Will this interfere with my trunk seal or undercarriage?

The lip is designed to sit forward of the bumper cover without contacting the trunk seal or undertray. Verify clearance by test-fitting before final fastener tightening, especially if you run lowered suspension or have modified ground effects.

Can I install this with adhesive, or do I need to drill?

This lip mounts to factory anchor points via fasteners — no adhesive required. Use the OEM mounting holes in your bumper support. Fasteners are not included; reference your vehicle service manual for specification and torque values.

Will the lip stay stable at highway speeds?

Proper fastener engagement and even tension across all mounting points ensures stability at speed. After installation, verify that all fasteners are fully seated and torqued evenly, and re-check them after your first 100 miles of driving.