AEM X-Series 30-0300 Wideband Air/Fuel Ratio Gauge – 2-1/16" (52mm)

Take full command of your engine's fuel mixture with the X-Series 30-0300 Wideband Air/Fuel Ratio (AFR) Gauge. Designed to fit a standard 2-1/16" (52mm) gauge pod, this precision instrument gives you real-time wideband O2 readings so you can dial in the perfect tune for maximum performance, efficiency, and power on your Ford Mustang, Chevrolet Camaro, Corvette, or any compatible vehicle.

With a bold, easy-to-read digital face and a wide AFR measurement range, this gauge is a must-have upgrade for serious enthusiasts, track-day drivers, and professional tuners alike. The plug-and-play wiring harness and intuitive mounting design make installation straightforward even in tight engine bays.

Key Features

Wideband O2 Monitoring: Displays accurate real-time air/fuel ratio data across a wide measurement range
Universal 2-1/16" (52mm) Gauge Pod Fit: Slots neatly into standard single or triple gauge pods
X-Series Digital Display: High-contrast, bright readout clearly visible day or night
Compatible Vehicles: Ford Mustang, Chevrolet Camaro, Corvette, and other performance cars with standard 52mm gauge mounts
Complete Kit: Includes wiring harness, O2 sensor bung, and all necessary hardware for installation
Model Number: 30-0300
Gauge Diameter: 2-1/16" / 52mm

Why Upgrade to a Wideband AFR Gauge?

Running too rich or too lean can rob your engine of power and accelerate wear. A wideband AFR gauge gives you the real-time data you need to ensure your engine is operating at the ideal air/fuel mixture — whether you're on the street, the strip, or the track. The X-Series 30-0300 delivers the accuracy and readability that tuners and racers demand.

Perfect For

Ford Mustang (all generations with 52mm gauge compatibility)
Chevrolet Camaro & Corvette
Custom builds and track cars
EFI and carbureted applications
Professional tuning shops and enthusiast garages

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Frequently Asked Questions

Q: What vehicles is the X-Series 30-0300 Wideband AFR Gauge compatible with?

A: The 30-0300 X-Series Wideband AFR gauge is designed to fit any vehicle with a standard 2-1/16" (52mm) gauge pod, including the Ford Mustang, Chevrolet Camaro, and Chevrolet Corvette. It is also suitable for most custom performance builds that use a 52mm gauge mount.

Q: What does a wideband air/fuel ratio gauge do?

A: A wideband AFR gauge measures the ratio of air to fuel in your engine's combustion process in real time using an O2 (oxygen) sensor. This lets you and your tuner verify that the engine is running at the optimal mixture — critical for maximizing power output, fuel efficiency, and engine longevity.

Q: Does the 30-0300 kit include everything needed for installation?

A: Yes — the kit includes the gauge unit, wiring harness, O2 sensor bung, and the hardware required for a complete installation. Always consult a qualified mechanic or tuner if you are unsure about wiring or exhaust modifications.

Q: What gauge pod size does this fit?

A: The X-Series 30-0300 is designed for a standard 2-1/16-inch (52mm) gauge pod, which is the most common size used in aftermarket A-pillar pods, dash pods, and pillar mounts for performance vehicles.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.