GIAC Stage 1 Plus Porsche Cayenne ECU upgrade


The Porsche Cayenne 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 1 Plus Porsche Cayenne ECU upgrade (2019 - 2021) with 3.0 Turbo engine. The Porsche Cayenne ECU upgrade replaces the standard software in your car's engine control unit without any physical modifications. In other words, the tune adjusts ignition timing, fuel delivery, boost settings, rev limiter and/or speed limiters to optimize performance and, in some applications, fuel economy. We can easily flash the ECU upgrade through the OBD-II port of your car (an installation fee is additional).

GIAC's understanding of vehicle controllers goes much deeper than simple table variable modification. While 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.

GIAC map switching gives customers the ability to change performance settings in their vehicle without a visit to the shop. The switch takes a couple of seconds and can even be done while the vehicle is idling. We have tuning products for fuel quality ranging from 91 to 109 octane covering both normally aspired and turbo models.

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

Stage 1 Plus ECU upgrade

GIAC CO2 emissions

We designed the GIAC Stage 1 Plus ECU upgrade to dramatically increase torque and horsepower without sacrificing smooth drivability. In addition, the software accommodates numerous aftermarket performance modifications. Upgraded intake system, exhaust system and/or a charge cooler will further improve the performance.


  • 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 Porsche Cayenne ECU upgrade

Stock 91 octane by Porsche 91 octane by GIAC Stage 1 Plus*
Peak horsepower (hp) 335 370
Peak torque (lbf∙ft) 332 392
Max horsepower increase over stock* (hp) +35
Max torque increase over stock* (lbf∙ft) +60

* 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.
- 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 1 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.

Emissions Certification

GIAC CO2 emissions

We are proud to announce that GIAC Stage 1 plus software for this vehicle, now has emissions approval with an Executive Order assigned from the California Air Resources Board (CARB).
This Executive Order states that "GIAC Performance Software has been found not to reduce the effectiveness of the applicable vehicle pollution control systems for the models listed here." For more information about all approved vehicles read here.

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 Porsche ® 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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