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I think you are talking about the lug bolts. Yes, brakes and caliper have to come off, and I am not even sure that you can change out bolts, I have a feeling you will be replacing the entire bearing/hub assembly.
Havent done hubs on my dako yet. But on the Hemi, It's a uni-hub, and no I dont think there was enough room to bust the studs out. Also, they are press-in studs.