You can find the chip tuning file for your Audi RS6 C5 - 2002 - 2004 4.2 Biturbo 450hp vehicle on our site. These files are created especially for you and handed to you. All our Tuning files are extensively tested on Dynometer. The development of the tuning file for your Audi RS6 C5 - 2002 - 2004 4.2 Biturbo 450hp vehicle is the result of a special product by EcuPrime Engineers. In addition, we can increase the power of your vehicle from 450 HP to 520 HP, 560 Torque to 725 Torque.