If you are adding sensors or accessories to your Holley EFI system, the Power Tap gives you a much cleaner way to do it. Built into the connector, it provides easy access to chassis ground, sensor ground, a 5V reference, and a switched 12V output, so you can power common add-ons like flex fuel sensors, dome pressure sensors, and alternator exciter leads without cutting or splicing into the main harness. That means a neater install, less wiring confusion, and a factory-style look that is easier to troubleshoot later. That's a big win for 11 bucks.

The biggest advantage is keeping the main harness intact while using Holley-provided reference power and ground for better signal quality and less noise. Just keep in mind that the switched 12V output is meant for low-current devices or relay triggers, and the 5V reference should only be used for high-impedance sensors, not heavy loads. For anyone building out a Holley EFI or Terminator X setup, the Power Tap makes expansion simpler, cleaner, and more reliable.

Shop the Holley EFI Power Tap here.

Watch the full video to see how the Power Tap works and why it is such a smart way to add sensors and accessories to your EFI system.