The AutoMeter 4375 Ultra-Lite Air/Fuel Ratio Gauge provides precise monitoring of your engine’s air/fuel mixture in an easy-to-read digital LED display. Designed for performance enthusiasts, this 2-1/16" (52.4mm) narrowband gauge is ideal for fine-tuning carbureted or fuel-injected applications. The Ultra-Lite series features a lightweight brushed aluminum finish, bright LED indicators from lean to rich, and a quick response design to help ensure maximum performance.

Perfect for street, strip, or track use, this gauge gives you the accuracy and durability AutoMeter is known for. Compatible with most narrowband O2 sensors (0–1V output).