AutoMeter 52mm Z-Series Narrowband Air/Fuel Ratio Gauge, Lean-Rich (2675) Engine Pulley Cover This results is much higher/hotter

This results is much higher/hotter intake air temps

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2015-2020 BMW M4

part number FMAM-B2

AutoMeter 52mm Z-Series Narrowband Air/Fuel Ratio Gauge, Lean-Rich (2675) Engine Pulley Cover This results is much higher/hotterA 2 1 16" digital narrowband air fuel ratio gauge with LED radial bar graph display that pairs with older oxygen sensors to warn of lean burn conditions under heavy engine load. Features: Compatible with factory narrowband O2 sensors (0 1V) LED radial bar graph display Lean Rich range Does not require backlight Not compatible with 5 wire air fuel sensors or wideband O2 sensors (0 5V) May require model 2244 if vehicle lacks factory narrowband primary