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APR 4.0 TFSI V8 ECU Stage 1 Upgrade - RS6/RS7 C7.5




APR’s ECU Upgrades are the best dollar-per-horsepower modification one can make to the 4.0T engine. The upgrades dramatically increase horsepower and torque, making for an exceptionally quicker and more exciting vehicle. This is made possible through APR’s optimization of the factory engine management system to take full advantage of the engine’s capabilities, without needing any end user adjustment. The software loads to the factory ECU through the OBD-II port, resulting in a clean and headache-free install. Furthermore, for those looking for tuning with a limited powertrain warranty, APR Plus has you covered!

The APR Stage 1 ECU Upgrade requires no hardware modifications and is available with 665-722 HP and 726-849 FT-LBS of torque, depending on octane. Gains as high at +119-212 HP and +183-304 FT-LBS of torque are available throughout the power band!

All APR Software upgrades are only available at our Joplin, Missouri retail location. In order to receive an APR software upgrade, please click here to schedule an appointment. You may either add this item to your cart and purchase online, or may also pay in store. 


 Vehicle Engine Transmission
Audi RS6 C7.5 4.0 TFSI All
Audi RS7 C7.5 4.0 TFSI All