We're excited to announce APR's Engine Control Unit (ECU) Upgrades are now available for the Audi S8 (D5) 4.0 TFSI V8 engine with the Bosch MG1 ECU! Expect massive gains with up to 685-767 HP and 731-804 FT-LBS of torque on tap, depending on octane, from this simple software upgrade.
Please note that this ECU upgrade can only be installed at one of our shops. Please feel free to contact us to set up an appointment to have your ECU upgrade installed.
APR's ECU Upgrades are the best dollar-per-horsepower modification one can make to improve engine performance. 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 ECU Upgrades are available with various features and supported octane levels and each stage is compatible with most typical bolt-on modifications. The software is installed to the vehicle's factory ECU through the OBD-II port once the ECU is unlocked, resulting in a clean and headache-free install. Furthermore, for those looking for tuning with a limited powertrain warranty, APR Plus has you covered!
- Delivers up to 685-767 HP with 731-804 FT-LBS depending on octane
- Max gains of +128-222 AWHP and +165-245 AWFT-LBS depending on octane
- Supports 91 AKI, 93 AKI, 100 AKI, and 104 AKI fuel grades
- Optional factory term limit matching limited powertrain warranty with APR Plus
- Quicker acceleration
- Speed limiter removed
- Standing RPM soft limiter increased
- Left-foot braking / brake boosting added
- Properly rescaled performance gauges
- Optimized thermal management and protection
- Optimized launch control strategy for faster response
- Optimized driveline protection during launch
- No hardware required (Software only)
- Supports standard bolt on modifications
- Eliminated the need for a TCU upgrade to achieve full torque
- Free lifetime updates
- Direct OBDII port flash (No ECU removal)
- 30 day money back guarantee
APR ECU Upgrade Stages
Our new suite of MG1 ECU software comes after months of extensive research and development that is typically absent from the aftermarket. Our upgrade makes the engine more powerful and more exciting. We’ve extensively calibrated the system to work flawlessly on the track, while retaining safety routines to protect your engine in the most demanding scenarios. This was all made possible by our engineering team's pursuit of perfection. Development vehicles were outfitted with additional sensors, including turbo shaft speed sensors, thermocouples, transducers, and more, along with our high speed direct RAM logging equipment, to feed valuable data to the team for analysis. After thousands of hours of testing and tuning we created new calibrations that are fine tuned for several octanes and contain hundreds of map changes, with a vast array of safety features built in.
The APR Stage I ECU Upgrade is the first step towards making more power! This simple upgrade requires no engine hardware modifications, and produces 685-767 HP and 731-804 FT-LBS of torque depending on fuel grade. Gains as high as +128-222 AWHP and +165-245 AWFT-LB of torque are available throughout the power band, depending on fuel grade and factory output, making the vehicle exceptionally quicker in all scenarios. For even more power, this stage is compatible with normal bolt-on hardware modifications.
APR Stage 1 is available for 91 AKI, 93 AKI, 100 AKI, and 104 AKI in North America.
The APR Plus ECU Upgrade is the first step towards making more power, and it includes our limited powertrain warranty. This simple upgrade requires no engine hardware modifications, and produces 685 HP with 731 FT-LBS of torque. Gains as high as 128 HP and 165 FT-LBS of torque are available throughout the power band, making the vehicle exceptionally quicker in all scenarios.
The APR Plus ECU Upgrade matches the performance of our Stage 1 ECU Upgrade (91 octane). To get even more power, you can add any of our other Stage 1 compatible products and still be covered under the APR Plus warranty! If you're not interested in the APR Plus limited powertrain warranty, and want even more power, check out our other Stages.
- 2020+ Audi D5 S8 4.0T