Will this interfere with my factory bumper seal or splash guard?

This lip mounts forward of the bumper assembly using existing attachment points, so you'll want to check clearance with your current splash guard and undertrays before final fitment. Remove any trim pieces that sit directly below the lip mounting area and reinstall after securing the spoiler.

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

This lip uses bolt-on mounting at factory locations, so no drilling or adhesive is required. You'll work with existing holes in the bumper support structure. Check your bumper's mounting layout to confirm drilling has already been done from the factory.

Will the carbon fiber stay stable at highway speed?

Carbon fiber is stiffer than OEM plastic and won't flex or rattle under airflow. The single-piece design keeps it rigid, and proper bolt torque at all mounting points ensures it stays solid. Verify all fasteners are tight before taking the road—vibration can loosen mounting hardware over time, so check them after your first 50 miles and periodically thereafter.