Integrated Engineering Performance ECU FlashRequires Integrated Engineering POWERLink OBDII Dongle (IESOVU7). Select option to add if required. WHAT DOES AN ECU TUNE DO? VW & Audi 1. 8T Gen 3 engines are controlled by an advanced Engine Control Unit (ECU). This powerful computer is loaded with complicated maps and routines from factory to optimize vehicle efficiency over performance. Tons of available power is left on the table and the calibration is not written to take advantage of aftermarket
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