AEM X Series AFR Boost Gauge Kit – Why This Combo Matters
Power is nothing without control.
This kit lets you monitor:
- Air/Fuel Ratio (AFR) → ensures safe combustion
- Boost Pressure → tracks turbo/supercharger performance
Because if either one goes wrong, your engine follows.
The X-Series Wideband UEGO AFR Sensor Controller Gauge (PN 30-0300) measures 2 1/16th-inch (52mm) in diameter, and features a modern, visually striking faceplate and new seven-segment center display that may be 87% larger than the 30-4110 AEM Wideband Gauge’s center display.
Key Features & Functions
Wideband UEGO AFR Monitoring
The heart of tuning:
- Accurate, real-time AFR readings
- Includes wideband O₂ sensor
- Fast response for dynamic conditions
Because AFR is the difference between power and engine damage.
This creates the perception of a bigger overall gauge, but in a common 52mm size Compatible with easy mounting. Its slim depth (less than one inch overall) and ultra slim cup depth of .200-inches dramatically increases its application base and potential mounting locations. X-Series Wideband UEGO AFR Controller Gauge were fastest responding wideband air/fuel ratio controllers in an independent test vs. 17 competitor wideband AFR controllers
Boost Pressure Monitoring (Up to 35 PSI / 2.5 Bar)
Built for forced induction:
- Tracks boost levels precisely
- Detects spikes or drops instantly
- Essential for tuning and diagnostics
Because boost issues don’t announce themselves.
Includes Bosch 4.9LSU wideband UEGO sensor
Factory calibrated resistor does not require free-air calibration, but technology allows Compatible with free-air calibration as sensor ages if user desires
X-Series Digital 52mm Gauges
Modern, high-performance display:
- Bright LED readouts
- Slim 2-1/16″ (52mm) design
- Easy visibility in all lighting conditions
No guessing—just clear, accurate data.
Compatible with vehicle/system voltages up to 16V
0-5V & RS232 output Compatible with data logging and feedback regulate, AEMnet (CANbus) Compatible with data logging and daisy-chaining more than one controllers up to 16 cylinders AEM’s 30-0306 X-Series -30in/Hg~35PSI / -1~2.5BAR Digital Boost Display gauge combines fantastic looks, increased readability and a multitude of new, easy-to-use features! This can be a will have to Compatible with users who want highly accurate boost pressure readouts up to 35 PSI or 2.5 BAR in their high performance vehicle. 2-1/16th (52mm) gauge diameter Compatible with easy mounting in gauge pods
Fast Response & High Accuracy
X-Series advantages:
- Faster refresh rate than traditional gauges
- Improved precision under load
- Smooth, stable readings
Because fast engines need fast data.
0-5V Analog & AEMnet Outputs
Built for advanced setups:
- Data output for ECU integration
- Compatible with data logging systems
- Expandable for full monitoring setups
Because data should work for you—not just sit there.
Slim 0.825” overall gauge depth and 0.200” cup depth – mount them virtually anywhere!
Programmable center LED is 87% larger than original AEM gauges
Complete Plug-and-Play Kit
Everything included:
- Wideband sensor
- Boost sensor
- Wiring and hardware
No piecing together parts—install and go.
24 green outer LEDs Compatible with quick reference to engine parameter
User selectable standard or metric display ( -30in/Hg~35PSI / -1~2.5BAR)
Peak/Recall via gauge face buttons
User selectable threshold warnings
Bonus Included
These kits come directly from MAPerformance, and yes—they include a MAPerformance lanyard.
Because apparently your keys also need to match your build now.
Why You Need This AEM X Series AFR Boost Gauge Kit
If you’re running boost and tuning for performance, this is essential.
The AEM X-Series AFR & Boost Kit gives you:
- Accurate AFR data for safe tuning
- Reliable boost monitoring up to 35 PSI
- High-speed data output for advanced setups
- Complete kit with sensors included
Because guessing AFR or boost is how builds fail.
Maximize Engine Efficiency: Keep your engine running at peak performance with the wideband air fuel gauge, which as it should be monitors air/fuel ratios to prevent damage and achieve optimal fuel efficiency in any driving condition
Achieve Protected Boost Levels: Deal with regulate over turbo or supercharger pressure with the turbo boost gauge; monitor your boost levels in real time to prevent over boosting and ensure long-term engine health, perfect for an automotive gauge set
Clear and Quick Readouts: The high-resolution digital boost gauge has an 87% larger LED display for instant readability; user-friendly designed with programmable features with two buttons on the faceplate for peak/recall and threshold warnings
Versatile Installation: This gauge kit for cars features a slim 52mm profile for easy fit into standard gauge pods and any gauge cluster; AEMnet CAN-bus enabled, it supports daisy-chaining with systems like Infinity ECU and compatible data loggers
Data-Driven Tuning: Connect the AEM wideband sensor to compatible systems for seamless data logging and track performance metrics; the included 0-5V analog outputs facilitate easy integration, enhancing your tuning capabilities
Ideal Applications
- Turbocharged builds
- Supercharged setups
- Standalone ECU systems
- Track and race cars
- High-performance street builds
Final Verdict
The AEM 52mm X-Series Wideband AFR & Boost Gauge Kit is a must-have for any serious performance build.
It gives you the data you need, the accuracy you trust, and the control your engine demands.
Plus, you get a lanyard—so now even your keys are part of the build.
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