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Audi S4 RS4 2.7 biturbo (ME 7.1) MaxxECU RACE Plugin EXTRA MaxGM Sensor GND + 5V power Wideband oxygen sensors provide Sensor GND + 5V power supply 2 Uses stock vehicle knock sensor(s) Stock MAF sensor can be removed (if exist) and replaced with MaxxECU internal MAP sensor Control orginal idle solenoid
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US$ 39.95
US$ 39.95
US$ 109.95