For any serious engine builder or tuner, precise data and complete control are non-negotiable. The AEM Series 2 EMS ecosystem provides the tools needed to push your build to its limits, but navigating the array of available gauges, sensors, and ECUs can be a challenge. From monitoring vital engine parameters to taking full command of fuel, ignition, and boost, having the right components is critical for both performance and reliability.
This roundup cuts through the noise to present eight of the best AEM Series 2 EMS-compatible products. We’ve selected a range of essential items, from individual digital gauges for specific functions to comprehensive wideband kits and the powerful Infinity ECUs that form the brain of the system. Whether you’re completing your dashboard or building a race-ready engine management suite, this list will help you identify the perfect components for your project.
Essential AEM Series 2 Engine Management Components
- Flynsu 0-150 PSI Digital Oil Pressure Gauge
- AEM X-Series Gauges Combo Set – Wideband AFR & Boost/Fuel Pressure
- NOCO GENIUS1: 1A 6V/12V Smart Battery Charger & Maintainer
- AEM Electronics 30-2310 X-Series OBD2 Wideband AFR Gauge
- AEM Electronics 30-0334 X-Series Wideband UEGO AFR Gauge Kit
- AEM Electronics 30-0300 X-Series Wideband UEGO Controller Gauge
- AEM Electronics 30-4901 Infinity ECU with 8 Injector & Ignition
- AEM Electronics 30-4950 Infinity ECU with 8 Valve Driver
Flynsu 0-150 PSI Digital Oil Pressure Gauge
Keeping a close watch on oil pressure is one of the most critical aspects of engine monitoring. This Flynsu digital gauge provides precise, real-time feedback with a clear 0-150 PSI range, displayed in easy-to-read 1 PSI increments on its central LED screen. The standard 52mm housing ensures it fits in most standard gauge pods, making it a direct replacement for other popular models.
Installation is straightforward thanks to the included plug-and-play harness and sensor. The auto-dimming display and 24 green LED indicator lights provide immediate visual reference, preventing distraction during night driving while ensuring you can always quickly assess your engine’s oil pressure status. It is a reliable and accurate component suitable for both carbureted and modern EFI vehicles.
AEM X-Series Gauges Combo Set – Wideband AFR & Boost/Fuel Pressure
This two-gauge kit from AEM is an excellent starting point for anyone serious about tuning and monitoring their engine. It combines two of the most important metrics: air-fuel ratio and boost or fuel pressure. The wideband AFR gauge delivers precise lambda and AFR readings, while the second gauge can be configured for either boost or fuel pressure monitoring up to 15 PSI.
Both gauges feature a compact design with a shallow depth, allowing them to be mounted in tight spaces. The advanced displays use a large center LED number for the primary reading, surrounded by 24 outer LEDs for at-a-glance reference. With user-selectable warning functions and data outputs for connection to an EMS or data logger, this combo set provides professional-grade functionality in a single package.
NOCO GENIUS1: 1A 6V/12V Smart Battery Charger & Maintainer
While not a gauge or sensor, a reliable battery is fundamental to any modern engine management system. The NOCO GENIUS1 is a compact yet powerful smart charger designed to maintain your vehicle’s battery in peak condition. It works with a wide range of 6V and 12V batteries, including lead-acid and lithium-ion types, making it versatile for various applications.
Its precision charging capability is enhanced by an integrated thermal sensor that adjusts the charge rate based on ambient temperature. This feature prevents overcharging in hot conditions and undercharging in the cold, which helps to extend your battery’s overall lifespan. It also functions as a desulfator, helping to recover and maintain batteries that have been sitting.
AEM Electronics 30-2310 X-Series OBD2 Wideband AFR Gauge
This AEM X-Series gauge offers a unique integration feature by connecting directly to your vehicle’s OBD2 port. It functions as a wideband air-fuel ratio gauge and sensor controller, providing accurate, real-time AFR data. The OBD2 connectivity allows it to display additional engine parameters available on the CAN bus, making it a more comprehensive monitoring solution.
The unit boasts a bright, digital LED display that is easy to read in all lighting conditions. It includes user-programmable warning settings to alert you of potentially damaging lean or rich conditions. This model is particularly useful for those who want to add precise wideband monitoring while also having access to basic OBD2 data streams without additional wiring complexity.
AEM Electronics 30-0334 X-Series Wideband UEGO AFR Gauge Kit
The AEM 30-0334 is a complete wideband air-fuel ratio gauge kit that is known for its accuracy and reliability. It comes with everything needed for installation, including the gauge, a Bosch wideband O2 sensor, and all necessary wiring. This kit is designed to provide precise AFR measurements, which are essential for proper engine tuning and diagnostics.
Its display features a large digital readout for the air-fuel ratio, surrounded by a series of LEDs that provide a quick visual reference. The gauge offers multiple output options, including a simulated narrowband signal for stock ECUs and a linear 0-5V analog output that can be directly connected to a data logger or a standalone ECU like the AEM Series 2 for closed-loop fuel control.
AEM Electronics 30-0300 X-Series Wideband UEGO Controller Gauge
As a foundational component in the AEM lineup, the 30-0300 X-Series Wideband UEGO Controller Gauge delivers professional-level air-fuel ratio monitoring. It is a full-function gauge that combines a clear digital display with a built-in wideband controller, eliminating the need for a separate control box and simplifying installation.
This gauge provides highly accurate readings and is built to withstand the harsh environment of an engine bay. It outputs a standard 0-5V analog signal that is perfectly suited for feeding data into a standalone ECU, allowing for advanced functions like closed-loop lambda control. Its robust design and proven performance make it a trusted choice for both street and competition use.
AEM Electronics 30-4901 Infinity ECU with 8 Injector & Ignition
This is where engine management reaches a professional level. The AEM 30-4901 Infinity ECU is a powerful standalone engine control unit capable of managing complex engine setups. It comes equipped with eight high-impedance injector drivers and eight ignition drivers, allowing it to control most V8 engines or two four-cylinder engines directly.
The Infinity ECU offers immense processing power and flexibility, supporting virtually any engine type and configuration. It features a robust set of I/O, high-speed CAN bus, and Ethernet connectivity for advanced data logging and tuning. This ECU is designed for tuners and builders who require absolute control over fuel, ignition, and boost with a high degree of precision.
AEM Electronics 30-4950 Infinity ECU with 8 Valve Driver
Building upon the capabilities of the 30-4901, the AEM 30-4950 Infinity ECU includes an additional eight valve drivers. This makes it one of the most capable ECUs in the consumer market, designed for the most advanced and complex engine builds that require control beyond just fuel and spark.
The integrated valve drivers allow for direct control of variable valve timing (VVT) systems, nitrous solenoids, water injection, and other proportional or on/off valves. This level of integration simplifies wiring and provides seamless control of auxiliary functions directly from the main ECU. It is the ultimate choice for race applications or high-end street builds where every aspect of engine performance needs to be meticulously managed.
Buying Guide: How to Choose the Best AEM Series 2 EMS
So, you’re thinking about stepping up your engine management game with an AEM Series 2 EMS. I get it; it’s a big decision. These units are powerful, but with a few different models and a sea of features, it can be tricky to pick the right one for your project. Let me walk you through what I usually consider.
First, you need to be honest about your project’s goals. Are you building a weekend warrior, a dedicated track monster, or a high-horsepower street car? The base AEM Series 2 EMS is a fantastic all-rounder, handling everything from turbocharged four-cylinders to built V8s. But if you’re planning on running a factory drive-by-wire throttle body, you’ll want to look specifically at the Infinity or CDI versions, as they have that functionality built-in. Don’t get stuck with a box that can’t run your throttle.
Next, think about your tuning method. Are you a seasoned tuner who lives and breathes fuel maps, or are you going to rely on a professional shop? The AEM software is incredibly deep, which is great for precision, but it can be overwhelming for a beginner. If you’re not planning to tune it yourself, your choice might be influenced by what your local tuner is most comfortable with. I always recommend having a chat with your tuner before you buy anything.
Wiring is another huge factor. The Series 2 can be purchased as a standalone harness or as a plug-and-play unit for specific vehicles. The plug-and-play option saves an enormous amount of time and potential wiring headaches. If your car is listed, it’s almost always the better choice. For a custom swap or a tube-frame race car, the standalone harness gives you total flexibility, but be ready for a significant wiring project.
Finally, consider future expansion. Maybe you’re just running a simple turbo setup now, but what about later? The best AEM Series 2 EMS for engine management is one that grows with you. Look at the number of available inputs and outputs. Need to control a water/methanol injection system, a boost controller, and multiple fuel pumps? Make sure the model you choose has enough ports to handle all your accessories without needing extra expansion boxes. Planning ahead saves money and frustration down the road.
Frequently Asked Questions
What’s the main difference between the AEM Series 2 and the Infinity?
This is probably the most common question I see. While both are incredibly capable, the Infinity is essentially the next evolution, often seen as a more premium option. The Infinity typically features a faster processor, a built-in high-resolution display for dash functions, and integrated drive-by-wire control. The standard Series 2 is a powerhouse in its own right, but for the most advanced projects where you want everything in one box, the Infinity is the way to go.
Can I install and tune an AEM Series 2 EMS myself?
You can, but I would only recommend it if you have a solid understanding of engine fundamentals and are comfortable with complex software. The installation can be straightforward if you opt for a plug-and-play harness for your specific vehicle. The tuning side, however, has a steep learning curve. It’s not impossible to learn, but making a mistake can be very costly for your engine. For most people, having a professional handle the initial tune is the safest bet.
Is the AEM Series 2 only for race cars?
Not at all! While it’s a favorite in the racing world for its robustness and features, it’s also an excellent choice for high-performance street cars. Its ability to manage complex setups, provide data logging, and offer incredibly precise control over fuel and ignition makes it a great upgrade for any serious enthusiast looking to maximize power and reliability, whether on the track or the street.
Do I need a wideband O2 sensor with the AEM Series 2?
Absolutely, yes. The ECU relies on a wideband oxygen sensor to see the actual air/fuel ratio in your exhaust. This data is critical for both tuning and for the ECU’s self-tuning features to work correctly. Many kits come with one, but if yours doesn’t, you will need to purchase a compatible wideband sensor and controller separately. It’s not an optional accessory; it’s a core component of the system.
What kind of support and software is available?
AEM provides the tuning software, called AEMPro, for free download from their website. It’s a full-featured program that gives you access to every parameter. As for support, there is a wealth of information in the form of user manuals, application guides, and forums filled with experienced users and tuners. For direct technical support, you can contact AEM, but often the community knowledge base is the fastest way to find an answer.