Integrated Engineering (IE) ECU Tune for Audi B9/B9.5 2.9T

The Integrated Engineering (IE) IESOVZ21 is a performance ECU tune engineered for the Audi B9/B9.5 2.9T RS4 and RS5 models from 2018-2023. This tune unlocks significant power potential, with Stage 1 and 2 tunes offering up to 542 HP and 581 ft-lbs of torque on E85 fuel. For even greater performance, Stage 1 & 2 Plus tunes, requiring an upgraded High-Pressure Fuel Pump (HPFP), can achieve up to 604 HP and 660 ft-lbs of torque. The IESOVZ21 tune supports various fuel types, including 91, 93 AKI (95, 98 RON), and E85/TrueFlex ethanol blends. It features advanced capabilities such as anti-lag launch control, rolling launch control with brake boost enabled, instant launch-RPM setting via the cruise control stalk, and the ability to default auto-start/stop to off. The tune also offers an enhanced exhaust overrun and crackle feature in Dynamic drive mode. For users seeking maximum output, Stage 3 tunes, designed to pair with PURE800 twin turbo upgrades, can reach up to 741 HP and 688 ft-lbs of torque. Installation and use require the V4 IE POWERlink flash tool. The tune is registered to the vehicle's ECU and is non-transferable, except in the event of vehicle ownership transfer. Note that 2021+ models have advanced security locks preventing Stage 2 Transmission Control Unit (TCU) tuning; Stage 1 TCU tuning is compatible and included with all Stage 1 and 2 ECU tunes. Hardware upgrades such as an intake, turbo inlet pipe, and intercooler are optional but recommended for maximum power gains.