NEW HEAVY DUTY VOLTAGE REGULATOR FOR DELCO 10SI, 12SI, 15SI & 27SI ALTERNATORS New Aftermarket Part (Not Rebuilt/Refurbished/Repurposed) 1 Year Warranty HEAVY DUTY REGULATOR Voltage: 12, Set Point: 14.8, Terminal ID: Light-Sense, Polarity: Negative or Positive, Activation: Ignition, Circuit Type: A-Circuit Delco 10SI, 12SI, 15SI & 27SI Type 100 Alternators