AEM Power Harness for Wideband Gauge (30-4400) - 30-3403

About Product About the Brand AEM Power Harness for Wideband Gauge (30-4400)AEM Power Harness for Wideband Gauge (30-4400). Power Harness for 30-4400 Voltage Gauge. Voltmeter Gauge Wiring Harness. Power Harness Whether its for a full rebuild or some standard maintenance, the proper engine components are needed to make sure your vehicle is running smooth. When it comes to old car or engine swaps, your may find yourself needing a new wiring harness. Sometimes your wiring harness gets old and faulty, especially on those classic car. Other times, your may need a new wiring harness with the proper adapters if your are performing an engine swap on your vehicle. About AEM AEM was founded in 1987 by John Concialdi (J.C.) and Bob Sullivan as a tuning performance shop. The shop focused on vintage automobiles and the latest trends in street racing modified imports. With it's location in Compton California, AEM was embedded in the tuner market from the very beginning. It was a matter of bei