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There 2- 14 mm head bolts that are on the slides that have the rubber boots need to come out. These are the only two bolts you need to remove in order to pull the caliper off of the pads. If you are planning on replacing the rotors or just want to take the pad holder off there are two additional 17 mm headed bolts that hold the pad holder to the steering knuckle. This will allow you to put the pad holder into a vice to clean the grooves were the pads slide. At this point if you want to replace the rotor or machine the rotor which I recommend that you do, the rotor will come right off the hub.