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The AEM X-Series Wideband UEGO AFR Gauge (30-0300) is one of the fastest responding widebands on the market, designed to give tuners and enthusiasts the most accurate air/fuel ratio readings possible. Built with AEM’s patented X-Digital technology, this wideband reduces deadtime and improves AFR feedback for safer, more powerful, and more precise tuning.
Traditional widebands suffer from deadtime—the lag between changes in exhaust gas composition and when the sensor reports that change. AEM’s advanced sensing technology minimizes this delay, providing real-time AFR data that allows tuners to make faster adjustments and optimize performance whether on the street, strip, or dyno.
Brand: AEM Electronics
Part Number: 30-0300
Gauge Size: 2-1/16” (52mm) digital display
Range: 8.0:1 to 20.0:1 AFR
Technology: X-Digital wideband technology for ultra-fast response
Sensor Type: Bosch LSU 4.9
Display: High-contrast digital readout with sweeping LED needle
Outputs: 0-5V analog output + AEMnet (CANbus) for data logging and engine management
Power Source: 12V vehicle system
Applications: Ideal for tuning and monitoring any internal combustion engine (gasoline, ethanol, flex-fuel capable)
| Category | Application | Fitment Notes |
|---|---|---|
| Universal Fit | All gasoline engines | Wideband is universal, requires O2 bung in exhaust |
| Forced Induction Builds | Turbocharged & supercharged engines | Critical for safe AFR monitoring under boost |
| Naturally Aspirated | Street & race engines | Optimizes fuel efficiency and power tuning |
| Flex-Fuel / E85 | Ethanol-based tuning setups | Provides accurate readings across fuel types |
| Dyno Tuning | Shops and professional tuners | Industry standard for precise AFR feedback |
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