This Napa Echlin VR191 voltage regulator is a high-quality replacement part for your Buick Reatta, Roadmaster, GMC Syclone, or Voltage. It is designed to fit securely with a bolt-on mounting style and has a 4 pin connector. This vintage part is made by NAPA and is water-resistant, heat resistant, and durable. It is perfect for those looking for an easy installation and is compatible with OE/OEM part numbers 1116411, 1116436, 1116413, 1116429, and 1116419. This voltage regulator is a great choice for those who want a reliable replacement part for their vehicle.