Holley EFI NTK Wideband O2 Sensor
Holley Part #: 554-100
Matt's Notes: The best wideband sensor that you can use for your Holley EFI system.
Replacement Holley EFI Bosch Wide band Oxygen sensor. This sensor is a direct replacement for Holley HP, Dominator, Avenger and Terminator EFI systems. Each Sensor is hand calibrated to insure accurate readings when used in conjunction with your Holley EFI system.