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Holley Air/Fuel Ratio Monitors


Holley
Holley Air/Fuel Ratio Monitors

Monitor the air fuel ratio while you drive or while your fine tuning the engine! Part #510-534-51 is supplied with an oxygen sensor and is designed for carbureted, non-sensor equipped vehicles. Part #510-534-50 does not come with an oxygen sensor and is designed for vehicles already equipped with an O2 sensor. Both versions allow you to immediately see the effects of tuning adjustments made on your vehicle.



2 Products
Air/Fuel Ratio Monitors

510-534-50
Rich/Lean Indicator
  • Sensor NOT Included
    More info on Holley 534-50

    Fits Applications
    • FREE
    • SHIPPING
      & HANDLING!
    Installation Instructions for Holley 534-50
  • $129.95
    Order Today Ships 05/02/14

    510-534-51
    Rich/Lean Indicator
  • Sensor Included
    More info on Holley 534-51

    Fits Applications
    • FREE
    • SHIPPING
      & HANDLING!
    Installation Instructions for Holley 534-51
  • $185.95
    Ships

    2 Products