I got it for my 2000 Civic Si. I noticed that with my AEM pulleys at night time with my headlights & stereo going my headlights would dim at stop lights. My voltmeter would drop to 11 volts.
After putting in the Sun Auto Hyper Voltage System now my headlights don't dim (and are actually brighter) and my voltage stays at 12-13 volts. So it does work.
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