Will this fan bolt directly to my radiator without any modifications?

Yes. This assembly mounts at factory radiator points with no drilling or bracket fabrication needed. Everything lines up as OEM intended.

Do I need to drain coolant to swap this out?

You'll need to disconnect the radiator hoses to remove the old assembly and install the new one. Drain your coolant into a clean container first, then refill once installation is complete. Refer to your service manual for torque specs on hose clamps.

What electrical connector does this use?

The fan assembly plugs directly into the factory harness connector. No wiring modifications or adapters required.