2-1/16in C2/S Wide Band Air/Fuel Gauge

The AutoMeter 2-1/16in C2/S Wide Band Air/Fuel Gauge (Model 7178) is a precision wideband air-fuel ratio instrument designed for engines requiring real-time combustion feedback. This electric digital gauge monitors air-fuel ratios across a 6:1 to 20:1 AFR range, making it essential for tuning naturally aspirated engines, turbocharged builds, and forced-induction applications where fuel mixture precision directly impacts power output and engine reliability.

The 2-1/16-inch diameter gauge face with white background fits standard automotive instrument clusters and aftermarket gauge panels. AutoMeter's C2 wideband architecture delivers accurate AFR readings across the full operating envelope, enabling tuners and enthusiasts to optimize fuel maps, adjust carburetor needles, or verify fuel injection programming without guesswork. The digital display format provides immediate numeric feedback that's critical during dyno sessions, road testing, and on-the-fly tuning adjustments. This is a single gauge unit measuring 5.5 x 5.2 x 5.6 inches and weighing 1.25 lbs.

This wideband air-fuel gauge serves engine builders, performance tuners, and serious enthusiasts who need objective data during engine development. Whether validating a custom fuel system, confirming ECU tuning results, or troubleshooting a lean condition, the C2/S wideband sensor provides the granularity required for precision work. It's particularly valuable in racing environments, turbo builds, and carbureted performance engines where stoichiometric balance directly influences throttle response, maximum power, and long-term engine longevity.

AutoMeter wideband air-fuel gauges are recognized within the tuning and engine building community for sensor accuracy and gauge reliability. The 6:1–20:1 AFR measurement range covers rich idle conditions through lean cruise and peak-power mixtures, supporting a broad spectrum of engine calibrations from mild builds to aggressive racing setups.