Will this mount at the factory attachment points without any drilling?

Yes. This mirror is designed to use your existing factory mounting holes — no modification needed.

Does this mirror stay stable at highway and towing speeds?

The OEM-profile design maintains rigidity under load and airflow typical of Super Duty towing. Test-fit before highway use to confirm no vibration at your speed range.

What hardware do I need to install this?

Hardware is not included with the mirror assembly — use the fasteners that came with your original mirror or source OEM-spec bolts that match your vehicle's attachment pattern.