I have an electronic afr Guage that display both # and had a sweeping led. I recommend this type as you just need to do a quick peripheral glance and see that the afr is in the right zone. My Guage show green>orange >yellow >red. All you need to see is the right color led lit and you know you're AFR is ok. The ## is nice as it shows exact numbers but they jump up and down like mad! They are decimal not the easiest thing to read when your flying down the road or racing.
YzGyz
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