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![LSU4 Wideband Oxygen Sensor for Holley EFI [Thread-In]](https://www.jegs.com/images/mini_750/500/510/510-554-101.jpg)
Vehicle Info NeededHOLLEYPART NUMBER: 510-554-101
LSU4 Wideband Oxygen Sensor for Holley EFI [Thread-In]
$20795
5 left in stock
Ships on Sep 08, 2026
Lowest Price GuaranteeSensors & Accessories
LSU4 Wideband Oxygen SensorHolley HP, Dominator, Avenger & Terminator EFI Systems Bosch LSU4 Wideband Thread-In Mounting 8-Pin Rectangular Plug Hand Calibrated
The LSU4 Wideband Oxygen Sensor measures exhaust air/fuel ratio and feeds it back to the ECU for closed-loop tuning. Each unit is hand calibrated so it reads accurately the moment it is installed on a Holley EFI system.
Holley 554-101 Features:
- Bosch LSU4 wideband oxygen sensor for precise air/fuel readings.
- Thread-in mounting into a standard O2 bung.
- 8-pin rectangular plug connection.
- Direct replacement for Holley HP, Dominator, Avenger and Terminator EFI systems.
Part TypeOxygen Sensor
BrandHOLLEY
Package Height2.7
Package Width5.4
Package Length5.5
Weight0.4 PG
Part CategoryPerformance Parts
Wiring Harness IncludedYes
Mounting StyleThread-in
TypeScrew-In
Oxygen Sensor Bung IncludedNo
Wire NumberOEM
QuantitySold individually
Part FitmentUniversal
Wiring Harness Plug Style8 rectangle male
Number Of Wires8
Vendor Part Number554-101
Package Qty1
Package TypeEA
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