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There aren't really any cons to using a large alternator, other than it being a waste of money if the extra amps are never being used. As far as pros, a larger, more powerful alternator, correctly installed in a system designed to make use of it, will allow more electrical and electronic components to be installed in the vehicle. Items such as big stereo amps, large light displays, fridges, a/c units or heaters, microwaves, etc. usually require a larger alternator and better battery to operate normally.

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15y ago

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