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2. Even after 14 years, our original OEM alternator was still working fine, but our power demands had grown to a sketchy point and we wanted to add a little more charging juice to be safe. The Powermaster alternator is a direct bolt-in replacement for our stock unit, and a welcomed addition to a truck running three auxiliary lights, two winches, two stereo amplifiers, split between two batteries. Needless to say, we were a prime candidate for a high-output alternator. Each Powermaster unit is tested before it leaves the facilities. Our particular Dodge unit (No. 43311) put out 118 amps at idle and 176 amps at highway cruising speeds. The old stock alternator we replaced peaked at 120 amps.