GIAC DSG Stage 2 Audi S5 B8.5 TCU upgrade


The Audi S5 B8.5 TCU upgrade delivers faster gear changes and optimized transmission protection for end-user performance modifications.

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We are pleased to present the GIAC DSG Stage 2 Audi S5 B8.5 TCU upgrade (2013 - 2015) with 3.0 Supercharged engine. The Audi S5 B8.5 TCU upgrade supports higher torque levels, faster shift speeds, and higher launch and rev limiters to ensure you get the most from your car. Matching this program with the GIAC engine calibration will give the best results. GIAC DSG performance software complements our performance engine calibrations. The installation process is very quick, using regular GIAC flashing tools through the OBDII port. Installation does not require removal of the DSG computer from the car at any time (an installation fee is additional).

Please choose the local pickup option at check out, when you purchase the product.

DSG Stage 2 TCU upgrade

GIAC DSG Stage 2 TCU upgrade allows the transmission to hold higher torque levels with faster acceleration and quicker shifts.

The Audi S5 B8.5 TCU upgrade is available for the following TCUs (feel free to stop by our shop to check yours): 8K1927156R; 8K1927156S; 8K2927156M; 8K5927156D.


  • Shift points raised to 7,200 RPM in sport mode and 7,100 RPM in manual mode (can not be matched with OEM rev limits in the engine computer)
  • Optimized torque control for faster, smoother shifting
  • Clutch pack clamping pressure raised to support higher torque levels
  • Launch Control added to some 2010 model S4s
  • Launch control set at 4,000 RPM (from 3,000 RPM stock in DSG)
  • Torque requests and limits raised
  • Remapped sport mode "drive program" with improved ability to hold gears and added overheating protection

Requirements and Recommendations

GIAC checklistRequirements

GIAC Stage 1 Plus ECU upgrade or GIAC Stage 2 ECU upgrade is required to be installed prior DSG Stage 2 TCU upgrade.

GIAC recommendationsRecommendations

We highly recommend the car to be in perfect mechanical condition before any installation has been done.

Installation details

After you purchase the software, we will contact you to schedule an appointment to install it. The installation must be done at our shop in Culver City, CA (full address) with a physically present car.

Give us a call at (562) 448-2599, send us an email to, or also use our contact form (click here) if you have any questions.

Warranty and Returns

GIAC warrantyWarranty

GIAC products carry a 30-day money-back guarantee. Also, GIAC Flashloader Handheld (FHH) and Flashloader Mobile (FLM) devices carry a 30-day money-back guarantee and a one-year GIAC product replacement guarantee. For details click here.

GIAC returnReturns

If you are not satisfied with the product, you can return it within 30 days for a full refund of the software (less installation). To clarify, all returns must be made at the original point of sale within 30 days of receipt of merchandise. Custom designed or engineered products are non-returnable.

About GIAC

GIACGIAC is a software engineering company with many years of experience tuning cars (since 1997). Our software replaces the standard software in your car's engine control unit and/or transmission control unit. We are designing after-market software for Porsche ®, Audi ®, VW ®, and Bentley ®. In addition, we have a long history of tuning many other European makes on a case-by-case basis. Also, our accessory products include the Flashloader handheld switcher, which enables easy switching between multiple GIAC maps and the stock map.
GIAC has produced the highest quality performance software for Audi ® vehicles for longer than most other tuners have been in existence. In fact, all GIAC calibrations for VAG cars, whether for a sedan / sportback, SUV / Wagon, or Audi Sport ® vehicles, reflect the knowledge and rigorous test methodology we have developed since 1997. Even more, GIAC designs and develops, in house, software and hardware tools for reading and writing vehicle controllers, for creating and compiling vehicle calibrations, and for vehicle parameter logging. We succeed with these cars year after year because we have skills, knowledge, and resources to get it right.
Pictures used for marketing purposes only, actual product may vary.


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AudiS5B8.5 (2013-2016)3.0TCabriolet Quattro
AudiS5B8.5 (2013-2016)3.0TCoupe Quattro

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