Auto Meter 3379 Sport-Comp Wide Band Air Fuel Ratio Kit Gauge kit includes custom tuned .1 AFR Resolution Bosch LSU4.2 Sensor, 8ft. wiring harness, 304 stainless steel weld-in bung, mounting hardware, and detailed instructions for installation 0-4v data output feed for ECU, data acquisition unit, or Laptop tuning Suitable for use with gasoline powered engines Digital segment display and LED radial bar graph display 12 and 16 volt compatible, compatible with nearly every street car or race car electrical system