Fuel Gauge 0-100psi 1/8 NPT

The Fuel Gauge 0-100psi 1/8 NPT from Holley is a precision instrument designed for serious engine builders, drag racers, and fuel system diagnosticians who need real-time fuel pressure monitoring. Whether you're tuning a naturally aspirated stroker, managing boost on a forced-induction platform, or diagnosing fuel delivery issues on a street or competition engine, this gauge delivers the accuracy and durability required for critical fuel system management.

The 0–100 psi range covers everything from stock carbureted applications to high-flow EFI systems operating at elevated rail pressures. Built to Holley's exacting standards, this fuel gauge features a direct 1/8 NPT port connection that threads securely into fuel rails, filter mounting blocks, or regulator housings without adapters. The analog needle display reads instantaneously with zero electrical lag, making it ideal for real-time diagnostics during tuning sessions or live engine operation.

Mechanics and tuners trust Holley fuel gauges when baseline diagnostics demand accuracy; whether verifying fuel pump volume, confirming regulator bypass at idle, or detecting regulator function under varying load conditions. The compact design allows discreet mounting on a dashboard, A-pillar pod, or engine bay harness, while the precision-calibrated dial ensures repeatable readings across your entire operating window—critical when dialing in lean fuel tables.