X-Series Digital Accuracy
AEM’s high-speed controller provides:
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Faster refresh rates
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Smooth boost tracking
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Stable, consistent readings
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Better resolution than analog needle gauges
AEM’s digital Boost display gauge delivers unsurpassed accuracy and visibility. Each gauge includes 24 color-coded (Red, Green, Yellow) LED lights that change from green to yellow to red for immediate reference to the measured parameter, and an integrated thee-digit display that reveals real-time operating conditions.
52mm (2-1/16”) Digital Display
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Crisp, bright LED boost readout
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Outer LED ring shows boost rise instantly
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Black or silver bezels included
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Interchangeable faceplates
AEM’s digital display gauges feature a standard 52mm gauge housing that fits in most gauge pods and can be remotely mounted virtually anywhere. Each gauge includes interchangeable silver and black bezels and black and white faceplates to personalize the look of your gauge—it’s like having four gauge designs in one! Three digit readout in center
Sensor-Compatible Design
Works with standard AEM MAP/boost pressure sensors for precise data acquisition.
Analog Output
Integrates with:
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Standalone ECUs
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Piggyback controllers
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Datalogging systems
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AEM CD-Series dashes
Why This Gauge Matters
Reliable boost data is essential for:
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Preventing overboost
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Catching wastegate failures
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Tuning boost curves
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Monitoring turbo spool behavior
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Ensuring fuel pressure matches boost (boost-referenced systems)
The 30-4406 gives you real-time accuracy that cheap gauges simply can’t deliver.
Ideal For
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Turbo street builds
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Drift and track cars
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Big-turbo conversions
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E85 high-boost projects
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Supercharged applications
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Engines using standalone ECUs
Installation Notes
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Requires a compatible AEM MAP/boost sensor
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Route boost reference hose away from heat
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Use dedicated vacuum/boost source from manifold
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Wire analog output to ECU for boost safeties or logging
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Standard 52mm mounting
Average install time: 30–60 minutes.
Final Verdict
The AEM 30-4406 –30 to +35 PSI Digital Boost Gauge is one of the most accurate and responsive boost monitoring tools available.
With its X-Series electronics, wide measurement range, and clean 52mm digital face, it’s the perfect upgrade for anyone running a turbo or supercharger.
If you want consistent boost control and reliable data under load, this is the gauge you run.
Zapablast05 –
AEM is a well known company in the car world, and makes high quality products. I purchased this gauge to replace a Prosport boost gauge that fried. Installation was painless and took roughly 20 minutes since I reused the air hose from the Prosport gauge. I strongly recommended that you buy an add-a-circuit fuse kit (ASIN B01LFXA5UA) if you don’t have any, it will make installation much easier so that the gauge can be powered by one of your car’s powered circuits, like the radio. The kit also comes with several butt splices although one would suffice. The cables for the gauge are extremely long, so be aware that you must have adequate room to tuck them away. I paired this gauge with an AEM UEGO Wideband gauge (ASIN B00N3VGPYS) and SMY Dual Gauge Cluster (ASIN B01M7MEKUS). The numbers are also very readable in the day time and stand out in the night, although the sweeping color band is a bit washed out during the day but still visible. No issues with this gauge and I’m very pleased!
Jwhit –
I bought this to mount in my EVO X to watch my boost levels while driving and I am very pleased with the ease of installation and design of this gauge. I also like that they include two different color choices for the boarder of the gauge (black and silver). Installation was easy especially since there are YouTube videos available to show you how to set this up with. All-in-all, the ease of installation, color options, and accuracy makes this a good purchase and I would buy again if need be.
Binh Nguyen –
Great product and easy to install.
Jimmy Hawkisn –
Aem is the best and gave accurate boost readings. Setup was easy did it in my home garage
Jacob H. –
I received exactly what I ordered and exactly what I was expecting. I have the AEM UEGO wideband already installed in my 2010 WRX, and I love it, works flawlessly. And since the UEGO has a built-in ambient light sensor, I knew if I got another gauge from a different company, I would not only have my gauges not match, but one would constantly be brighter than the UEGO since it changes automatically. Now, my gauges match and their brightness auto adjust together and it looks awesome
Nick –
I had high expectations given the price point, I liked the fact it had customizable faces as I wanted white specifically. Only complaint is that the boost sensor wire was rather short when compared to their AFR gauge, I installed probably about 2 feet of wire to get the sensor connector from in my engine bay through my passenger firewall grommet and back to my driver side dash. My 07 Vibe is fairly compact so I was shocked the wire wasn’t longer, but it was easily fixable so I had no issue with it. It gives accurate and virtually instant feedback when vacuum/boost pressure changes at all so I’m very pleased with that. Includes a serial and monitoring wire as well if you’ve have another device that requires the sensor feedback which is super handy. Overall I’m very pleased at the price point, they even included multiple ways to integrate the gauge into the boost setup which was convenient. Lastly, it came with very detailed instructions so that was a plus!
2007st3 –
Had it in my SOLiD Modifications gauge pod In my 2011 STi. Read accurately when compared to the dyno.
bb999 –
I purchased this gauge for my STi. Install was easy, I made my own little bracket to mount it in the engine bay. The boost sensor I first received was defective, but I sent it in for an RMA and they got a new one to me very fast.The gauge is very readable in the daylight or at night. It is extremely responsive – probably as good as a mechanical gauge. Build quality is solid, and wiring it up was very easy (only 2 wires, +12v and ground). A T junction is provided to tap off the hose to your BOV/BPV.The only con I see to this gauge is there’s no indication, other than the LED needle’s position, when it’s reading vacuum or boost. Sometimes when I glance at it quickly I see a 2 or a 4, and I don’t know if it means a slight vacuum or slightly in boost. That being said, it should be quite obvious whether or not you’re pushing 15PSI boost or 15vacuum, so it’s not a deal breaker, just something that would have been nice.It’s also extremely difficult to take a nice picture or video of this gauge in action. Pictures make it out to be very glossy/reflective, and it flickers in videos.
Dale Sansome –
Almost perfect. Works pretty decent.
Great product, easy enough install. Sometimes the gauge sticks at 0 but other than that decent. Definitely could use a neg sign for vacuum or even a simple positive sign for boost.
James C –
works great and it a great little extra for any turbo/SC …
works great and it a great little extra for any turbo/SC car.I’ve got mine fitted inside my MX5’s vent and its a perfect snug fit.the only crit (and it’s a tiny one) is that the included hose is quite small luckily its still more then I needed but I could see others needing more.