Integrated Engineering TrueFlex Sensor KitEFFORTLESS ETHANOL Ethanol is rocket fuel for your B9 A4, A5, or Q5. Our iE TrueFlex Sensor Kit is the required harness upgrade to convert your 2. 0T engine to flex fuel. The sensor hardware allows your factory engine computer to read and instantly send the ethanol content of your fuel to our advanced TrueFlex tune, unleashing huge power. INSTALLATION Follow our step by step guide to install the sensor kit and required OEM hardware upgrades, and then
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