Audi 4M RS6 4.0L ECU and TCU Tune Bundle
The EA825 engine and 8-speed Auto Transmission found in the RS6 have proven to be an incredible platform that can handle upward of 1000whp while retaining its factory reliability. We have produced 860WTQ and 736WHP with an upgraded HPFP and E85 on stock turbos, and tested both TTE1020's and Pure900's upgraded hybrid turbos, and over 700 WHP with E85 on the stock turbos.
ECU
- Vehicle MPH speed limits removed
- Left-foot/brake boosting enabled
- Refined acceleration
- Maximized performance
- Access to 91, 93, and 100 octane, and E85 maps
- Upgraded HPFP REQUIRED to run Ethanol
- Custom tuning available for upgraded HPFPs, upgraded turbos, ethanol, and more
- Auto Start-Stop defaults to off instead of on or we can enable the remember feature where it will always take the last selected mode
TCU
- Increased torque limits
- Custom Launch Control RPM adjustment upon request
- Increased line pressure
- Smoother Opteration
- Faster shifting
ECU and TCU Flashing
There are two different options for ECU and TCU flashing. The First is for people who want the option of an at home flasher, allowing you to flash the stock and modified tune whenever and however many times you want, with no limit. The second option is for those who plan only ever flash the tune only once and have no need to ever flash again.
Learn more about both options below.
At Home Flasher
Only Flash Once
Learn more about both options below.
Audi RS6 Avant (C8) — EA825 4.0T Tune Support Chart (2020–Present)
We support all cars below in the chart
| Year | EA825 Models / Trims |
|---|---|
| 2020 | RS6 Avant (EA825 4.0T) |
| 2021 | RS6 Avant (EA825 4.0T) |
| 2022 | RS6 Avant (EA825 4.0T) |
| 2023 | RS6 Avant (EA825 4.0T) |
| 2024 | RS6 Avant performance (EA825 4.0T) |
| 2025 | RS6 Avant performance • RS6 Avant GT (limited) (EA825 4.0T) |
Note: C8 RS6 is Avant-only. 2024 introduces the “performance” variant; 2025 adds the limited RS6 Avant GT.