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034Motorsport is proud to offer 034EFI Chip Tuning for the AAN/ABY/ADU I5 20VT. Countless hours of dyno, street, and track testing go into each of our 034EFI tunes before release, to ensure an unparalleled driving experience.
The 034EFI RS2 Stage 1+ Chip Tune was developed to be the ultimate chip tuning solution for C4 Audi S4 & S6 (UrS4/UrS6) vehicles that have upgraded to an RS2 turbocharger. This chipset remaps the factory ECU's boost, timing and fueling to match the larger RS2 turbo, providing increased power without sacrificing reliability. The RS2 turbo offers a broad powerband with massive low-end torque, and impressive top-end horsepower.
Required Supporting Modifications:
Recommended (Optional) Supporting Modifications:
For information on how to determine whether your vehicle has an AAN or RS2 ECU, please view this Tech Article:
Note: We now only ship chips which can be installed by the user or an ECU specialist, we no longer offer the service of shipping in ECU's and modifying them.