Holley EFI 100 PSI Stainless Pressure Sensor 554-102 — 0.5–4.5V Linear Output, Pigtail Connector

Holley EFI 554-102 is a 100 PSI stainless steel pressure sensor that delivers a linear 0.5–4.5V output for plug-and-play fuel or oil pressure monitoring with Holley EFI systems.

Built to complement Holley EFI controllers and aftermarket installations, this compact sensor converts mechanical pressure into a predictable electrical signal for accurate logging, real-time display, and closed-loop tuning. Constructed from stainless steel, it resists corrosion and is suitable for under-hood and exposed installations. The unit ships with a pigtail connector to simplify wiring and to support customized harness layouts when integrating into performance, street, or marine powerplants.

How will this sensor integrate with my Holley EFI system?

Integration is straightforward: the 554-102 is designed to accept both fuel and oil pressure inputs and interfaces directly with Holley EFI inputs that expect a 0.5–4.5V sensor signal. No complex calibration is generally required beyond selecting the correct input type and scaling in your Holley controller.

• Direct compatibility with Holley EFI pressure input channels
• Linear output simplifies configuration and logging
• Pigtail connector allows easy connection to factory or custom harnesses

What performance and durability features does it offer?

Made from stainless steel, the 554-102 resists corrosion and handles typical automotive and marine environments. Its electro-mechanical design provides a stable, linear voltage output across the 0–100 PSI range for reliable readings under varying conditions.

• Stainless steel body for long-term durability
• 0.5V to 4.5V linear output for predictable scaling
• Rated to 100 PSI suitable for many fuel and oil systems

How do I wire and configure the sensor for accurate readings?

The sensor includes a pigtail connector to speed installation into existing harnesses; match the pigtail wires to your Holley EFI input wiring diagram. After physical connection, configure the Holley controller to the pressure sensor type and input scaling so the voltage-to-psi conversion is accurate in your displays and datalogging.

• Use supplied pigtail for clean harness routing
• Set the Holley input to sensor type and scale (0.5–4.5V = 0–100 PSI)
• Verify readings at idle and under load to confirm calibration

Where is this sensor best used and what mounting considerations matter?

The compact stainless body suits engine bays, fuel rails, and oil galleries where space and corrosion resistance matter. Mount it where it won’t suffer mechanical impact and where wiring can be routed away from extreme heat or moving parts to preserve longevity and signal integrity.

• Suitable for fuel pressure rails, oil lines, and test ports
• Install away from direct heat sources and chafe points
• Use proper thread sealant as recommended for your application type

Who is this for: The Holley EFI 554-102 is aimed at performance enthusiasts, tuners, and shops that use Holley EFI controllers and need a dependable pressure input for closed-loop control, data logging, or dash display. It’s a practical choice for racers, street/strip builds, and marine installations that require a compact, corrosion-resistant sensor with a clear linear voltage output and easy wiring options.