This LSU4 Bosch wideband oxygen sensor is a direct replacement for Holley HP, Dominator, Avenger, and Terminator EFI systems. Each sensor is hand-calibrated to ensure accurate readings when used with a Holley EFI system.
Specifications:
- Category: Emission Control
- Band Type: Wide
- Sensor Type: Lambda Wide Band
- Thread Size: 18mm x 1.5, Screw-in
- Part Type: Oxygen Sensor
- Compatible With: Avenger, Dominator, HP, and Terminator EFI systems
- Part Number: 554-101
FAQ
What systems does the 554-101 wideband sensor fit?
It's a direct replacement for Holley HP, Dominator, Avenger, and Terminator EFI systems.
What thread size does this sensor use?
It uses an 18mm x 1.5 screw-in thread.
Is this sensor calibrated?
Yes, each sensor is hand-calibrated to ensure accurate readings when used with a Holley EFI system.

