I have had them in my car for about 4 years now. It works with an electric fuel pump, HEI, sensors and sniper and runs on 13.6V. As soon as I turn on the AC or electric fan it runs on 13V or less (12.6V when cruising with AC and fan). on). Keeps my battery charged but struggles when draw is over 40-50 amps. Looks great, no problems with workmanship or mechanics.
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