Autometer Stack Instruments 52mm Wideband Air-Fuel Ratio (LAMBDA) Gauge - Black Rear Upper Strut Tower Bars The tube accommodates the factory

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Year Make Model Submodel 2020 BMW X3 M 2019-2022 BMW X3 M40i 2020-2022 BMW X4 M40i

Muffler 11255s weight-optimized 4x9x18in

Autometer Stack Instruments 52mm Wideband Air-Fuel Ratio (LAMBDA) Gauge - Black Rear Upper Strut Tower Bars The tube accommodates the factoryStack Wideband Air Fuel Ratio (Lambda) gauges are the ultimate tuning aid! Dimmable dual digital red numeric and multi colour radial LED displays provide accurate real time readout of either air fuel ratio or lambda (user selectable) in a format that is optimised for driver viewing. User adjustable scaling allows for tailored calibration for specialty fuel types and maximum display resolution per application. Inbuilt peak lean value recall and user