We're excited to announce our Engine Control Unit (ECU) Upgrades are now available for the Audi S8 (D5) 4.0 TFSI 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.
APR 2020+ Audi S8 (D5) 4.0 TFSI (EA825) ECU Upgrades!
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
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