This replacement Bosch LSU 4.9 wideband oxygen sensor restores accurate air-fuel ratio feedback on Holley Sniper EFI and Terminator X systems, with a thread-in design and anti-seize pre-applied to the threads.

Holley 554-155 Highlights:

• Fits Holley Sniper EFI and Terminator X systems.
• Genuine Bosch LSU 4.9 wideband element.
• Thread-in installation with anti-seize applied.
• Restores accurate air-fuel ratio feedback.

Emissions Note:

This part is legal for sale or uses on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

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