Emissions Testing Software Utilities 
Alex's Autohaus
FEBRUARY 28, 2023
The S6 and S7 no longer utilize the 4.0t. The RS7, S8, and new RS6 Avant also utilize it. Outside of Audi, the Porsche Panamera, Lamborghini Urus, and Bentley Continental, all utilize this motor. Keep in mind, downpipe upgrades will prevent you from passing emissions tests and may not be legal in all areas.
Alex's Autohaus
DECEMBER 30, 2022
Smaller turbos and less aggressive software from the factory led to a power output of 450 horsepower and 444 lb-ft of torque. You will not pass emissions tests with downpipe upgrades, and in some areas of the country, they are illegal for use on public roads. Upgrade Path One: S6, S7, A8 The low-output version of the 4.0t
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