Auto Meter Sport-Comp Series - Air/Fuel Ratio - 3378 - Auto Tuning Store



Auto Meter Sport-Comp Series – Air/Fuel Ratio — 3378

$494.01 $299.99

Wideband Air/Fuel Ratio PRO Wideband A/F Kit

Size:  2 1/16″ (52.4mm)

Range:  AFR or LAMBDA







An industry icon since the 1970’s, our Sport-Comp™ gauges reinvented performance instrumentation as we know it. A clean, easy to read design, highly ruggedized movements built to withstand the rigors of sportsman competition and the legendary look that set the standard in racing. Form follows function in a purpose built line of gauges designed and built to accomplish the singular mission of providing the most accurate information possible to the driver. Just as at home on the street as they are on the racetrack, this timeless design is the finishing touch to set off any serious build. Sport-Comp™ gauges are a huge part of the reason why Auto Meter™ holds more motorsport victories than every other gauge company combined.


Auto Meter Sport-Comp Series gauges utilize specially selected finishes to minimize glare while maximizing visibility and are illuminated using perimeter incandescent lighting. Red and green bulb covers are included to change backlight color. Additional bulb cover and LED replacement bulb options available separately.



  • LED digital display
  • 0-4v data output feed for ECU, data acquisition unit, or Laptop tuning
  • Auto-Dimming gauge brightness feature
  • Includes custom tuned .1 AFR Resolution Bosch LSU4.2 Sensor
  • Display data in Lambda or numerical A/F ratio
  • User programmable range
  • Peak recall/memory
  • 10:1 to 20:1 AFR Range for Gasoline Applications
  • Adjustable for Alternate Fuel Types (Ethanol, Methanol, Propane, CNG)
  • 6:1 to 18:1 AFR Range for Alternate Fuel Types
  • User Programmable Warning Function
  • This product has no provision for dial illumination/backlighting
  • Includes 8 ft. Wiring Harness


Additional information

Weight 1.4 lbs
Dimensions 5.5 × 6 × 6.5 in

Instruction Sheet

2 1/16″ Wide Band Air/Fuel Ratio Monitor Instructions


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