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For starters and alternators strong enough for your high compression engine, choose Powermaster Performance. Powermaster Powergen Alternators have the authentic look of original generators, but they are actually 75 Amp one-wire alternators. These alternators are available as 6 volt or 12 volt and will fit a variety of application including Flathead Fords and Early GMs. Get a Powermaster Powergen Alternator fast with Speedway Motors' award winning service & same-day shipping!