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14 The new Powermaster 105-amp alternator has the new pulley already installed. All you need to do is thread in the M8x25mm and M10x80mm bolts. This new alternator is a one-wire design, so if your ride is anything different you will need to reconfigure the wiring to hook up this unit. If your project needs more juice, EMS offers a 140-amp alternator as an upgrade for only $27 more.