Will this interfere with my trunk seal or undercarriage on speed bumps?

Front lips sit low but are designed to clear typical driveway angles. Verify clearance on your first drive by crossing slowly at the grade you typically encounter. If you run a lowered setup, test the approach angle before aggressive driving.

Can I use adhesive, or do I need to drill into the bumper?

Both methods work. Adhesive alone is reversible but relies on surface prep—sand and degrease thoroughly for lasting hold. Drilling offers permanent mounting but requires access to your bumper structure. Choose based on whether you plan to keep the lip long-term or experiment with fitment.

Does this obstruct my front brake lights or sensor cutouts?

This lip mounts to the lower bumper fascia and does not interfere with brake light housings. If your vehicle has front parking sensors or radar modules, verify their location against the lip profile before ordering to confirm compatibility with your specific bumper layout.