Will this interfere with my trunk seal or bumper attachment points?

This lip is designed as a lower fascia addition and does not contact the trunk weatherstrip or core bumper mounts. Before installation, verify your OEM bumper has factory fastener points at the lower valance—this lip integrates alongside them rather than replacing them.

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

FRP lips of this type are typically secured through the OEM lower fascia fastener locations. Adhesive alone is not recommended for this piece due to vibration and wind loads. Consult your vehicle's service manual to confirm fastener hole alignment before assembly.

How stable is this at highway speeds?

A single-piece FRP lip with proper fastening through the OEM mounting points is stable at speed. Ensure all fasteners are torqued evenly and the panel sits flush with no lifting edges. Check your work after the first 100 miles of driving, then periodically after that.