Will this bolt directly to my factory radiator mounts?

Yes. This fan is designed for factory mounting points with no drilling or modification needed. It bolts in where the OEM fan was.

Do I need to drain coolant to swap this in?

Refer to your vehicle's service manual for coolant drain procedures specific to your model year. Cooling system work often requires partial or full coolant replacement depending on what you're servicing.

Is the fan pre-assembled and ready to install?

The assembly ships complete and ready to mount. No additional assembly or prep work needed before installation.