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Porsche 958 Cayenne Turbo / Turbo S XperTune Performance Software (2011-2014)

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Porsche 958 Cayenne Turbo / Turbo S XperTune Performance Software (2011-2014)


Achieve maximum power gains (over 99 whp & 140 ft-lbs) and driveability without sacrificing reliability. Easily flash your Cayenne with a Fabspeed ECU Tune utilizing the included 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 ECU and mail it in for a tune. The handheld 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 Handheld

  2. Interface handheld 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 Handheld, then to the vehicle with the Handheld

  5. Enjoy your increased performance!

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


The dyno chart is a comparison between a 958 Cayenne first ran with our Secondary Cat Bypass Pipes, followed by the addition of Fabspeed ECU Tune. All testing was done on our in-house Dynojet by our experienced tuner.

  • Stock = 449 whp / 515 ft-lbs

  • Tuned = 536 whp / 620 ft-lbs

  • Peak power gains of 86 whp and 105 ft-lbs of torque

  • Maximum gains of over 99 whp and 140 ft-lbs of torque at 6000 RPM


"Porsche left a lot of room on the table for power gains - 140 ft-lbs of torque to be exact. The results are outstanding and the Cayenne feels like it shrinks in size becoming quicker and more capable like its brother the 911. With company in the car, be prepared to preface every throttle stab by saying "hold on". Driveability is improved with the throttle response being smoother and the car feeling more refined. I highly recommend running our Secondary Cat bypass Pipes to allow the turbos to breath better with the increased boost levels."


  • 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 Handheld device. 

  • Upon sending us your vehicle information, our tuner will email you a custom ECU Tune(s) within 1-2 business days. 

  • The Handheld device "marries" with your vehicle and can only be used on one vehicle.


  • If you prefer a traditional bench flash (mailing in your ECU) over a handheld device, or you are unable to use the Handheld device please contact us. 

Need some help using our XperTune Handheld Tuner? Watch our tuning tutorial video!

For Instructions on how to install your product please see the PDF below:

INSTALL GUIDE - MyGenius Tuner.pdf

Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.


We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.