Stack ST3401 Wideband Air/Fuel Digital Gauges

These Stack wideband air/fuel digital gauges are the ultimate tuning aids! Dual digital and radial LED displays provide an accurate real-time readout of either the air/fuel ratio or lambda (user-selectable). A 0-4 V analog output can be connected to a data logger or to an ECU to provide real-time, closed-loop feedback for improved mapping. These Stack gauges come complete with a wiring harness and include a Bosch sensor.

Additional features include:

• Programmable alarm to warn of dangerous lean condition
• Peak recall of leanest value during last run
• Suitable for all fuel types with AFR from 6:1 to 20:1 (not recommended for leaded fuel)