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Chip Tuning Package, Gt2871r Stage 1, Aan/Aby/Adu

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SKU: 034-103-1100-AAN

Manufacturer: 034Motorsport

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 GT2871R Stage 1 Chip Tuning Package was developed to be the ultimate chip tuning solution for Audi S2/RS2 and UrS4/UrS6 vehicles that have upgraded to a GT2871R Turbocharger. This chipset remaps the factory ECU's boost, timing and fueling to match the larger GT2871R turbo, providing increased power without sacrificing reliability. The GT2871R turbo offers a broad powerband with plenty of low-end and mid-range torque, and impressive top-end horsepower. While there is some loss of low-end torque when compared to a GT28RS or RS2 turbo, the GT2871R more than makes up for it in the higher RPMs.

This turbo package is ideal for someone looking for a strong powerband with good response and some lag.  Power comes on hard by 3500 RPM and holds clean to 7200 RPM. The GT2871R is also very efficient, meaning lower intake air temperatures for similar levels of boost.  Driving through traffic is effortless; downshifting is not necessary, but will be rewarded as this turbo offers plenty of top-end horsepower.

Though not as powerful as the GT3071R, the GT2871R is perfect for the those who want over 400 horsepower on stock internals.

This tune is recommended for all AAN, ABY, and ADU engines equipped with a GT2871R turbo, and utilizes the stock 4.0 BAR fuel pressure regulator (FPR) and stock mass airflow sensor (MAF). Does not require upgraded rods or pistons.


  • Dyno Proven 330 WHP & 320 WTQ (Gains of 145 WHP & 125 WTQ Over Stock AAN)
  • Broader Powerband & Improved Throttle Response
  • 26 PSI Boost Peak, Tapers to 22 PSI at Redline
  • Redline Increased to 7200 RPM
  • Air/Fuel Ratio:
    • 11.5-11.8 Under Boost
    • 14.7 Under Light Load & Idle Conditions
  • Recommended for 91-93 Octane Fuel

What's Included:

  • Bosch 550cc Fuel Injectors (Set of 5)
  • EV1 to EV14 Injector Connector Adapters (Set of 5)
  • 034EFI VariMAP with Installation Accesories
  • 034EFI GT2871R Stage 1 Chipset (Boost & Timing/Fuel Chips)
  • 034EFI 1.9 BAR Wastegate Spring

Recommended (Optional) Supporting Modifications:

Please Note:

  • RS2 High-Output Exhaust Manifold, 3" Performance Exhaust System, and Upgraded Bosch Fuel Pump are highly recommended with this tune.
  • If your ECU is already socketed, then we can ship you the Chip Tuning Package to install yourself with included instructions.
  • This tuning package is not compatible with the 3B ECU.

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.




  • This product is sold for racing and off-road use only.
  • This product is not CARB or EPA compliant, this product is not authorized for use in California on smog controlled vehicles.
  • By purchasing this product, you understand this product is sold for competition use on closed roads and is not legal for use in highway or street vehicles.

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