Description
The Speedhut 2-5/8" 30-0in/hg Vacuum Gauge (L25-VC1) is engineered for precise monitoring of your vehicle’s intake manifold vacuum and positive pressure levels. This high-performance gauge is equipped with a 3-wire military-grade transducer to ensure accurate and responsive readings across a range of 30-0 in/hg. With its 2-5/8 inch diameter, the gauge provides excellent readability while fitting standard mounting pods. Complete with a power and lighting harness and a 3-wire cable for the pressure sensor, this gauge is essential for monitoring engine health in both naturally aspirated and forced induction applications.
KEY FEATURES AND BENEFITS:
- Accurate Vacuum Monitoring: Displays intake manifold vacuum from 30 to 0 in/hg for engine health diagnostics.
- Military-Grade Sensor: Includes a 3-wire military-specification pressure transducer for precise, stable readings.
- Versatile Application: Suitable for both naturally aspirated and forced induction engines.
- Standard Gauge Size: 2-5/8 inch diameter fits common gauge mounts and pods.
- LED Illumination: Built-in LED lighting for enhanced visibility during nighttime driving.
- Simplified Installation: Comes with complete wiring harnesses for power, lighting, and sensor connection.
SPECIFICATIONS:
- Gauge Type: Boost/Vacuum Gauge
- Vacuum Range: 30-0 in/hg
- Size: 2 5/8 inch
- Hole Size: 2.67 inches (68mm)
- Units: Standard
- Pressure Sender Type: 3-Wire Military Grade Transducer (Performance)
- Included:
- Pressure Sensor – 30 psi
- 3 ft Power & Lighting Harness – for LED Lit Gauges and Clocks
- Pressure Gauge Wiring Harness (3-Wire Cable)
HOW TO USE:
- Mount the Gauge: Insert the gauge into a 2.67-inch (68mm) hole in your dashboard or gauge pod and secure it.
- Install the Pressure Sensor: Mount the 30 psi pressure sensor in a protected area within the engine bay.
- Connect the Vacuum/Boost Source: Use a vacuum hose to link the intake manifold to the sensor securely.
- Wire the Pressure Sensor: Connect the 3-wire cable from the sensor to the correct terminals on the gauge.
- Connect Power and Lighting: Use the power and lighting harness to connect the gauge to a 12V source, ground, and lighting circuit if desired.
- Verify Functionality: Start the engine and confirm that the gauge accurately displays vacuum and boost readings.
BENEFITS OF USING THE SPEEDHUT 2-5/8" 30-0IN/HG VACUUM GAUGE (L25-VC1):
- Enables accurate monitoring of intake manifold vacuum for early detection of potential engine issues.
- Helps diagnose vacuum leaks, valve problems, or inefficiencies in engine performance.
- Essential for tuning and monitoring forced induction systems to ensure optimal and safe boost levels.
- Military-grade sensor offers high reliability and confidence in readings.
- Facilitates easier installation with included wiring harnesses and clear instructions.
FEATURES:
- Dual Function Display: Monitors both vacuum and positive pressure readings.
- High-Accuracy Sensor: Utilizes a 3-wire military-grade transducer for consistent measurements.
- Clear Gauge Face: Large 2-5/8 inch diameter ensures easy visibility.
- Complete Installation Kit: Includes harnesses for power, lighting, and sensor connectivity.
- Standard Fitment: Designed to mount in 2-5/8 inch (66.7mm) openings using a 2.67 inch (68mm) hole.
- Backlit Display: LED illumination for nighttime readability.
- Durable Design: Built to perform reliably in rugged automotive conditions.






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