Porsche 991 GT3 / GT3 RS Fabspeed ECU Tune
Porsche 991 GT3 / GT3 RS Fabspeed ECU Tune
Porsche 991 GT3 / GT3 RS Fabspeed ECU Tune
Porsche 991 GT3 / GT3 RS Fabspeed ECU Tune
Porsche 991 GT3 / GT3 RS Fabspeed ECU Tune

Porsche 991 GT3 / GT3 RS Fabspeed ECU Tune

Regular price $1,695.00 Sale

Product Details:

Achieve maximum power gains and drivability without sacrificing reliability. Easily flash your 991 GT3 with a Fabspeed ECU Tune utilizing the included MyGenius handheld device.                                           

Fabspeed Motorsport offers an alternative tuning method for vehicles equipped with ECU's that traditionally required bench flashing. No longer do you need to remove your GT3's ECU and mail it in for a tune. The MyGenius device interfaces with the OBD-II port on your Porsche and your computer to complete the tuning process, which is as follows:

  1. Read stock data on vehicle via OBD-II port with MyGenius
  2. Interface MyGenius with software on your computer and send in data to Fabspeed Motorsport via email
  3. We use this data along with information you provide about your vehicle to write a tune for your specific setup and email back your custom tune in 1-2 business days
  4. Write the Fabspeed ECU Tune to your MyGenius, then to the vehicle with the MyGenius
  5. Enjoy your increased performance!

No need to send your ECU in to return to stock - simply use the MyGenius to flash back, then to your Fabspeed ECU Tune again at any point!


GT3 RS with Stock Hardware

  • Stock = 434 whp / 316 ft-lbs
  • Tuned = 440 whp / 323 ft-lbs
  • Maximum gains of over 15 whp and 10 ft-lbs of torque at 7500 RPM
  • Peak power gains of 6 whp and 6 ft-lbs of torque 

GT3 RS with Fabspeed Exhaust - coming soon

GT3 with Stock Hardware - coming soon


  • Fits all Porsche 991 GT3 vehicles (2014-2016)
  • You must review our MyGenius ECU Tuning Guide and email the ECU Tuning Information form to us. We utilize this form to ensure we meet your needs and consider your modifications to deliver the best possible results.
  • You must have access to a PC / Windows computer (Mac OS not supported) to upload your factory file information to us via email and in turn apply our ECU Tune to your MyGenius device. 
  • Upon sending us your vehicle information, our tuner will email you a custom ECU Tune(s) within 1-2 business days. 
  • The MyGenius device "marries" with your vehicle and can only be used on one vehicle.


  • If necessary we can perform a traditional bench flash on your ECU - you would need to mail your ECU to us. Please contact us for more information.