Will this mount to the factory bracket without modification?

Yes. This mirror uses the existing factory mounting points — no drilling, welding, or bracket fabrication required. Bolt it up using your current holes.

Do I need fasteners, or are they included?

Fasteners are not confirmed with this assembly. Bring bolts that match your factory spec or grab replacements from your local hardware supplier before install.

How do I know this mirror will clear my door and fender?

This is built to OEM dimensions, so clearance matches the original equipment that came on your truck. Test-fit before final tightening if you've added aftermarket body panels.