Holley's Wideband O2 Gauge with Controller is the ultimate addition to any carbureted or EFI vehicle. It accurately measures air/fuel ratio between 10:1 and 18:1. This allows the engine tuner to read the air/fuel ratio in real time for extremely precise tuning.
The gauge has a 3-digit numeric display and 40 segment bar graph. With high-intensity LEDs, you'll be able to view ratio readings even in direct sunlight. The gauge is designed to operate in street or race vehicles and withstands heat, dirt, and vibration. It fits in a standard 2-1/16" gauge pod.
FeaturesSimple InstallationIncludes Oxygen Sensor
Small Weather-Sealed Controller
Helps Tune for Maximum Power & Fuel Economy
Accurately Measures A/F Ratio between 10:1 and 18:1
2-1/16" Diameter for Convenient Mounting in Standard Gauge Pod
Built to Withstand Heat, Dirt, and Vibration for Racing Environments
3-Digit Numeric Gauge Display with 40 Segment Multicolor Bar Graph
Connects to Vehicle Light Switch to Dim the Gauge during Night Viewing