Pressure Transducer - 1600psi

The HOLLEY Pressure Transducer – 1600psi (SKU HLY554-104) is an electric pressure sending unit engineered for fuel system monitoring in performance and street applications. This 1/8 inch NPT male-threaded transducer delivers real-time pressure readings across the full 0–1600 psi range, making it suitable for naturally aspirated engines, turbocharged systems, and high-pressure fuel injection setups. The included wiring harness and connector ensure straightforward installation without custom fabrication.

Holley's 554-104 transducer integrates seamlessly into fuel systems requiring precise pressure monitoring for tuning, diagnostics, and safety. The 1600 psi maximum rating handles both carbureted fuel systems with lower regulation pressures and modern EFI platforms pushing higher rail pressures. The 1/8 NPT port accommodates standard fuel system fittings, and the factory harness eliminates guesswork during install. At 0.25 lbs, the compact design (4.4 × 2.3 × 4.7 in) allows flexible mounting near the fuel rail or remote location without adding bulk to the engine bay.

This transducer is ideal for builders and tuners upgrading fuel system instrumentation, engine swap projects requiring aftermarket gauges, and performance shops needing reliable pressure data for turbo calibration or naturally aspirated carb tuning. It addresses a critical gap in builds where original equipment instrumentation is absent or insufficient. Whether diagnosing fuel delivery issues, validating regulator function, or logging peak pressures under load, the 1600 psi range covers virtually all street and mild competition applications.

Holley remains a leader in fuel system components and electronic engine management. The 554-104 transducer is built for use with compatible Holley fuel pressure gauges and engine management systems that accept analog sender inputs. This electric pressure sending unit eliminates the mechanical gauge hose routing clutter while providing accurate, remote pressure display on dash-mounted instruments or digital tuning software interfaces.