Do I need the mounting hardware or bolts to install this?

Hardware is not included with this assembly. You'll reuse the existing bolts from your old hub when you bolt this new assembly to the knuckle. Have those original fasteners ready before you start.

What tools do I need to swap this out?

Jack, jack stands, socket set, and a hub puller or bearing puller tool. The bearing is pressed onto the spindle, so you'll need the right puller to separate the old assembly from the axle shaft cleanly. A torque wrench is recommended for final bolt tightening.

Will this work as a drop-in replacement for my old hub?

Yes—same mounting points, same electrical connector. The assembly bolts directly to your existing knuckle with no drilling or modification. Once you remove the old hub and install this new one, reconnect the square connector and you're done.