APR Audi S5 (B8) 4.2L FSI V8 ECU Upgrade

Automobile Magazine Review of APR Software

engineAPR 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!

Dyno Performance

APR dyno
North American Application Guide
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
Rest of the World Application Guide
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

APR DealerPlease 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.

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Phone: (800) 680-7921 Local Phone: +1 (334) 502-5181 Fax: (334) 502-5180 Address: APR LLC, 4800 US HWY 280 West, Opelika, AL 36801

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