3-3/8" Classic Boost/Vac Gauge | 30 inHg-0-30 PSI

SKU: L3-BV4-LEG
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$250.11 USD
Monitors manifold pressure across both vacuum and boost for full engine performance insight. Tracks engine behavior from idle to load to help identify leaks or tuning issues. Precision stepper motor ensures smooth, stable readings.
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Order leaves our facility in about 2 Weeks

Boost/Vacuum Gauge keeps you informed on manifold pressure so you can see how your engine responds during idle, cruising, and acceleration. Track vacuum for efficiency and engine health, then watch boost build under load to understand performance in real time. Built to show how your engine is behaving across the full range, it helps you catch leaks, tuning issues, or inconsistencies early. A precision stepper motor keeps the needle smooth and steady—no bounce, no guesswork. Built with a durable housing and solid aluminum bezel, it’s made for real driving conditions and long-term use. Made in the USA and backed for life.

Track-Tested. USA-Built. Backed for Life.

Key Features:

  • Dual-Scale Monitoring — reads both vacuum and boost in one gauge
  • Engine Performance Insight — track load, efficiency, and throttle response
  • Early Problem Detection — helps identify leaks, tuning issues, or inefficiencies
  • Microprocessor-Driven — real-time accuracy
  • Stepper Motor Precision — smooth, accurate pointer
  • Weather-Resistant Build — built for street, track, and off-road
  • Made in the USA — backed by a lifetime warranty
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Built to last. Backed for life.
  • Lifetime warranty on internal circuit board electronics
  • 5-year coverage on sensors and wiring
  • Applies to gauges purchased since Jan. 1, 2006

Every Speedhut gauge includes a lifetime warranty* on the electronic circuit board inside the gauge case. It is the core of the gauge — the part responsible for the precision communication that delivers the accuracy and performance Speedhut is known for.

Sensors, wiring, and other external components are covered by an unlimited 5-year warranty.

This combined lifetime / 5-year warranty applies to the original purchaser.
*For your lifetime — as long as you own the gauge — we stand behind it.
Speedhut Inc warrants products to be free from defects in materials or workmanship. This warranty is limited to repair or replacement. Speedhut Inc is not responsible for incidental or consequential damages. Improper use, installation, or unauthorized modifications void this warranty.
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