AUTO METER4375 Ultra-Lite Electric Air Fuel Ratio Gauge

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The Air/Fuel Ratio Gauge allows you to manage how much fuel is getting to the engine at certain accelerator positions. It is recommended to install a fuel management controller for better results. This gauge is excellent for automotive enthusiasts running a turbo'ed car.

Although its the "narrowband" version, this is cheap and i wanted to fill up a spot in my gauge pod and i have all autometer gauges. Not sure what having the "wideband" gauge would look like or do, but this gauge looks good while driving and is very high quality.

Autometer makes some very high quality gauges. This gauge is no exception in terms of build quality, but unfortunatley a narrow band AFR (Air-Fuel Ratio) gauge is not very useful. It taps into the car's stock oxygen sensor and as a result what you see on the gauge is a constant sweep back and forth from full rich to full lean. You get a pretty light show, but no useful information. Fortunately, Autometer will soon be releasing a wide-band AFR gauge that will include a Bosch wide-band oxygen sensor. That setup will provide useful information. Until then, skip this narrow band setup and save your money for something useful.