If you have never removed the rotors before there may be one or two retainers on the studs that you can cut off. You don't need to replace them. (see pic below)
The hub is seperate from the rotor. You replace the bearing in the front by replacing the whole hub. You will need a new hub assembly, retainer (a special, one use, 36mm nut), and dust cover.
2000 Mustang GT
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