APR Audi S5 (B8) 4.2L FSI V8 ECU Upgrade
APR is pleased to present the ultimate engine control unit (ECU) upgrade for the 4.2L FSI V8. APR’s ECU upgrade is available in octane-specific variations and is conveniently flashed to the vehicle’s factory ECU through the OBD-II port without any physical modification to the factory ECU.
The ECU’s MED 9 engine management system is responsible for proper operation of the engine during constantly changing environmental and load conditions. With built in compensational data for environmental variables and varying load conditions, the factory ECU is far more complex and intelligent than units found in other vehicle makes and marques.
APR's Calibration Engineers spent months calibrating the engine management system, including many hours of chassis dyno development. With a thorough understanding of the ECU’s torque structure, APR’s Calibration Engineers properly increased engine load to produce more power and torque across the entire power band. APR’s ECU Upgrade optimizes ignition timing, cam timing, lambda and more to produce higher output. Using APR’s proprietary high-speed data logging suite, the calibration team closely monitored the effects of these changes to help ensure an enjoyable driving experience.
APR’s ECU Upgrades provides an excellent leap in horsepower and torque while retaining OEM knock control sensitivity and other built in safety features. This results in an exciting and powerful upgrade, optimized for various fuel grades found around the world!
Stage I ECU Upgrade
Not only does our Stage I ECU Upgrade give you higher peak numbers of 362 horsepower and 352lb-ft. of torque, but also gains of up to 15 horsepower!
|Year||Vehicle||Engine||Stock||93 Octane (MON+RON)/2||Options||Price|
|2008+||Audi S5||4.2L FSI V8||355hp / 345ft-lbs||362hp / 352ft-lbs||Single Program||$699.00||Buy One Now|
|Year||Vehicle||Engine||Stock||98 Octane RON||Options||Price|
|2008+||Audi S5||4.2L FSI V8||355hp / 345ft-lbs||362hp / 352ft-lbs||Single Program||Contact Your Local APR Importer|
How to purchase
Please use the APR Dealer Locater Tool to locate an APR Dealer, confirm availability and schedule an appointment.
Please note vehicle manufacturers issue many ECU part numbers and revisions throughout their vehicle lineup. As such, some ECUs may be temporarily unavailable as new parts and/or revisions are released. If the vehicle’s ECU part number and revision is known, availability can be checked at any APR Dealer.
Security, Warranty and Money Back Guarantee
All APR ECU Upgrades include a limited lifetime warranty against defects in the software and to provide free updates and reflashes as they become available. Installation may be additional and is not included in the warranty.
All APR ECU Upgrades offer a 30 day money back guarantee with no questions asked. If for any reason you are unhappy with your APR ECU Upgrade you may return the upgrade to your place of purchase for a full refund provided you are within a 30 day period from your time of initial purchase. Installation is not included in the guarantee and is at the discretion of the place of install.