Developed for the high-output Audi RS6 4.0 TFSI V8 Performance (605 PS), this dual-mode Stage 2 ECU file includes both soft and full-power variants. Calibrated for Bosch MED17.1.1 with software version 004273 and ECU ID 4G0906560F, it enhances turbo response, torque curves, and overall driving dynamics — while allowing the user to choose between daily usability and maximum track output. Compatible with decat and upgraded intake setups.