Auto Meter 5703 Phantom Mechanical Boost/Vacuum Gauge,2.3125 in.

Auto Meter 5703 Phantom Mechanical Boost/Vacuum Gauge – 2-5/16″

Boost without a gauge is just confidence… and confidence is how engines get hurt.

The Auto Meter 5703 Phantom Mechanical Boost/Vacuum Gauge gives you real-time manifold pressure data—both vacuum (engine health) and boost (performance output)—in a clean, high-contrast Phantom series design that’s easy to read when things get serious.


Why a Boost/Vac Gauge Matters

This gauge tells you exactly what your engine is doing:

  • Vacuum (inHg) → idle quality, efficiency, leak detection
  • Boost (PSI) → turbo/supercharger output

Without it:

  • You won’t see overboost conditions
  • You’ll miss vacuum leaks
  • You’ll be guessing under load

And guessing under boost? Yeah… not recommended.

Traditional incandescent lighting illuminates around the perimeter of the dial
Auto Meter’s race proven mechanical instruments provide trusted accuracy while being simple to install
No electrical system required for gauge operation – compatible with every street or race vehicle

$92.39

Key Features & Functions

Dual Boost & Vacuum Monitoring

The 5703 tracks:

  • Vacuum for diagnostics and engine health
  • Boost pressure for performance tuning

One gauge, full intake system visibility.

Stark white dials, bright orange pointers and subtle black bezels make this extensive high performance line the very best match for any application.

Traditional incandescent lighting fixtures illuminates across the perimeter of the dial

Mechanical Gauge Operation

This is a mechanical gauge, meaning:

  • Direct manifold pressure readings
  • No signal delay
  • High accuracy under all conditions

Hook it to a vacuum line and you’re set.


2-5/16″ Gauge Size

The 2.3125 inch diameter offers:

  • Larger display for easy readability
  • Better visibility under load
  • Standard compatibility with pods and panels

Because boost happens fast—you need to see it fast.

Auto Meter’s race proven mechanical instruments provide depended on accuracy at the same time as being easy to put in
No electrical system required for gauge operation – compatible with each street or race vehicle

Phantom Series Styling

Clean, modern look:

  • White dial with black markings
  • Red pointer for high contrast
  • Soft glow illumination

Looks sharp—and easy to read day or night.


Fast Response Needle Movement

Mechanical operation delivers:

  • Instant feedback to pressure changes
  • Smooth, consistent readings
  • Reliable monitoring under boost

Because boost spikes don’t wait.


Gauge kit includes 1/8” nylon line, T-Fitting, vacuum fitting, compression fittings, bulb and socket assembly, red and green bulb covers, mounting hardware, and detailed instructions for installation

Why You Need This Auto Meter 5703 Boost Gauge

If you’re running forced induction—or even diagnosing engine behavior—this gauge is essential.

The Auto Meter 5703 Boost/Vac Gauge gives you:

  • Accurate real-time boost and vacuum data
  • Early warning of leaks or overboost conditions
  • Better tuning control and performance insight
  • Confidence when pushing your build harder

Because boost is fun… until it isn’t.


Ideal Applications

  • Turbocharged builds
  • Supercharged setups
  • Performance street cars
  • Track and drag builds
  • Engine diagnostics and tuning

Mechanical movements provide accuracy and sturdiness even within the harshest environments

Final Verdict

The Auto Meter 5703 Phantom Mechanical Boost/Vacuum Gauge is a must-have for any performance setup.

It’s accurate, responsive, and gives you the critical data you need to keep your build running strong.

Because when boost goes wrong… it goes wrong fast.


Specification: Auto Meter 5703 Phantom Mechanical Boost/Vacuum Gauge,2.3125 in.

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