Do I need any additional hardware to install this?

The assembly mounts at factory points, so you'll use existing fasteners. Have your service manual or a jack handy to access the mounting locations from underneath.

Will the chrome finish hold up in harsh weather?

Chrome plating is corrosion-resistant and designed to handle salt spray and UV exposure. Rinse it periodically to keep it looking sharp, especially after winter or coastal driving.

Can this be removed without permanent damage to the truck?

Yes. Since it bolts directly to factory points, you can unbolt it cleanly anytime. The mounting holes are stock locations, so removal leaves no traces.