Features:

• X-Series Wideband UEGO AFR Controller Gauge were fastest responding wideband air/fuel ratio controllers in an independent test vs. 17 competitors wideband AFR controllers
• Patented X-Digital wideband technology (Patent 9,575,030)
• Includes Bosch 4.9LSU wideband UEGO sensor
• Factory calibrated resistor does not require free-air calibration, but technology allows for free-air calibration as sensor ages if user desires
• Compatible with vehicle/system voltages up to 16V
• 0-5V & RS232 output for data logging and feedback control, AEMnet (CANbus) for data logging and daisy-chaining multiple controllers up to 16 cylinders
• Can display AFR values in hundredths of %
• 52mm gauge diameter and slim 0.825” gauge depth
• Gauge cup depth only .200” deep!
• Auto dimming feature
• User configurable display via buttons on the gauge face for changing AFR values, Lambda and O2%, and 3- or 4-digit display
• Black bezel and black dual faced faceplate included (gauge only, silver bezel/white gauge option sold separately, PN 30-0300-ACC)
• Locking connectors

FACTORY CALIBRATION RESISTOR OR FREE-AIR CAL, IT'S YOUR CHOICE! X-Series Wideband Gauges and the X-Series Inline Controller support the popular Bosch 4.9LSU sensor, and can utilize both the factory calibration resistor and free-air calibration methods. This allows users to take advantage of the precise factory resistor calibration when a sensor is new but then allows for free-air calibrations if the user desires when the sensor ages.** It's the perfect marriage of simplicity and accuracy! WHAT IS A WIDEBAND UEGO AIR/FUEL CONTROLLER? AEM's Wideband UEGO (Universal Exhaust Gas Oxygen, pronounced "You-Way-Go") Controllers are powerful, cost effective tuning tools that allow users to accurately monitor the Air/Fuel Ratio (AFR) of their engine. WHY USE A WIDEBAND AIR/FUEL CONTROLLER? Accurate AFR data is critical when tuning an engine. Running rich (very low air/fuel ratio, excessive fuel) can cause a loss in power, while running too lean (very high air/fuel ratio, not enough fuel) may result in serious engine damage. Using a wideband air/fuel controller during the tuning process allows you to monitor AFR and adjust tuning parameters to optimize them for maximum power and efficiency. AEM has a comprehensive line of highly accurate, reliable wideband air/fuel controllers that can help ensure your vehicle is optimally tuned. CAN I CHANGE THE AEM UEGO SENSOR'S CONNECTOR? No. There is a laser-etched, calibrated resistor in the sensor's connector body. This resistor is specifically created for the exact sensor that it is attached to. Modifying this will invalidate the sensor's output. * Independently tested at 360° Product Testing (results reported on August 31st, 2015) against 17 competitor wideband UEGO Air/Fuel Controllers. AEM X-Series Inline with Bosch 4.9LSU wideband sensor and AEM X-Series Wideband UEGO AFR Gauge with Bosch 4.9LSU sensor recorded the fastest response times. ** Wideband UEGO sensors are wear items and their lifespan is determined by many factors including contamination from leaded fuels, automotive fluids, particulates, mechanical or thermal shock and from being unheated and exposed to the exhaust stream. Free-air calibration may correct drift as a sensor ages, but it is recommended that they are replaced as part of your vehicle's maintenance program. When performing free-air calibration, please follow the procedure outlined in the instruction manual.

Display Gasoline values from 8.0:1 to 20.0:1 AFR

Display Lambda values from .55 to 2.00

OBDII Output Gasoline values from 8.0:1 to 20.0:1 AFR

OBDII Output Lambda values from .55 to 2.00

0-5V Output Gasoline values from 8.5:1 to 18.0:1 AFR (Requires Wiring)

0-5V Output Lambda values from .58 to 1.23 (Requires Wiring)

0-5V Output E85 values from 5.7:1 to 12.0:1 AFR (Requires Wiring)

0-5V Output Ethanol values from 5.2:1 to 11.0:1 AFR (Requires Wiring)

0-5V Output Methanol values from 3.75:1 to 8.0:1 AFR (Requires Wiring)