APR ECU Upgrade for the Audi S8 4.0 TFSI V8
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.
The APR Stage I ECU Upgrade requires no hardware modifications and is available with 646-692 HP and 656-713 FT-LBS of torque, depending on octane. Gains as high at +121-171 HP and +134-191 FT-LBS of torque are available throughout the power band!