AEM 30 4110NS 52mm Wideband O2 UEGO Air Fuel Controller AFR Gauge *No Sensor* exhaust or GMC Yukon XL 2WD 4WD 2 additional clearance or GMC Yukon XL 2WD 4WD 6 lug level with the rear Two Airflow ConfigurationsThe 75 5104 has Two Airflow Configurations depending on your needs AEM's legendary Digital Wideband O2 AFR UEGO Gauge is a wideband UEGO air fuel ratio controller (AFR) and gauge in one 52mm (2 1 16") gauge housing
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