GIAC Stage Xplus Bentley Continental GT W12 Gen 2 ECU upgrade


The Bentley Continental GT W12 Gen 2 ECU upgrade adds horsepower, torque and better throttle response throughout the power band.

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We are pleased to present the GIAC Stage Xplus Bentley Continental GT W12 Gen 2 ECU upgrade. It is for only for a few years in the 2nd generation (2011, 2012, and some models of 2013) model with the 6.0L W12 Turbo engine. The Bentley Continental GT W12 Gen 2 ECU upgrade replaces the standard software in your car's engine control unit (ECU). There are no physical modifications to the ECU. In other words, the tune adjusts ignition timing, fuel delivery, boost settings, rev limiter and/or speed limiters to optimize performance. In some cases, fuel economy can be improved too. To flush the ECU, we need to remove both ECUs from the car, unlock them and then flush them through OBD-II port. It will take 3 business days. There will be a fee for removing both ECUs.

GIAC's understanding of vehicle controllers goes much deeper than simple table variable modification. Most "tuners" can only add and subtract from existing tables in the Engine Control Unit. We have the ability to change the functionality of the ECU at the code level, allowing for a complete calibration and even creation of new tables and functions.

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

Stage 1 Xplus ECU upgrade

GIAC CO2 emissions

We designed the GIAC Stage Xplus ECU upgrade to dramatically increase torque and horsepower without sacrificing smooth drivability. In addition, the software accommodates numerous aftermarket performance modifications.

The Bentley Continental GT W12 Gen 2 ECU upgrade is available for the following ECUs: all. Feel free to stop by our shop to check yours.


  • Optimized torque control for smoother, faster shifting
  • Properly recalibrated air/fuel ratios
  • Improved throttle response for a drive-by-cable system feel

Power gains from the Bentley Continental GT W12 Gen 2 ECU upgrade

Stock 91 octane, from Bentley 91 octane, GIAC Stage Xplus*
Peak horsepower (hp) 567 667
Peak torque (lbf∙ft) 516 636
Max horsepower increase over stock +100
Max torque increase over stock (lbf∙ft) +120

* 91 octane fuel compatible. 93 equivalent fuel for optimum results.
- All fuel grades are North American AKI or (RON+MON)/2. For more details click here (Wikipedia article on fuel octane rating details).
- Reported wheel figures measured on GIAC's in house 4WD Mustang Dynamometer. Also, HP and Torque figures are average engine estimates from wheel power and acceleration testing. To sum up, the results will vary depending upon environmental conditions, vehicle, transmission, vehicle health, operating conditions, temperatures, fuel grade, dyno type, dyno setup, and other modifications.

Requirements and recommendations

GIAC checklistRequirements

There are no additional parts that are required to be installed for the Stage Xplus ECU tune.

GIAC recommendationsRecommendations

Adding a quality performance intercooler, intake and/or cat back exhaust system will improve performance.
Also, we highly recommend the car to be in perfect mechanical condition.

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 Bentley ® 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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