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Fabspeed Audi S8 V10 XperTune Performance Software

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Fabspeed Audi S8 V10 XperTune Performance Software


Achieve maximum power gains and driveability without sacrificing reliability. Maps are available for completely stock cars, or for cars equipped with an upgraded exhaust, intake or other performance enhancements. Increase the power and driveability by optimizing the ECU. We've had ample time with the 5.2L V10 S8 on our in-house Dynojet to unlock extra power on both stock vehicles and optimize performance with a Fabspeed exhaust. Once we receive your ECU, our tuner bench flashes it with the upgraded ECU map and we return it to you for easy re-installation; no modifications to the vehicle are necessary.  


  • Fits all Audi S8 5.2L V10 vehicles (2006-2010)


The dyno chart is a comparison between a stock S8 V10, followed by the addition of our Resonator Bypass X-Pipe and Fabspeed ECU Tune. All testing was done on our in-house Dynojet by our experienced tuner.

  • Stock = 312 whp / 298 ft-lbs

  • ECU Tune + Fabspeed Resonator Bypass X-Pipe = 341 whp / 340 ft-lbs

  • Peak power gains of 29 whp and 42 ft-lbs of torque

  • Maximum gains of over 44 whp and 42 ft-lbs of torque at 5500 RPM


  • Please review our Tuning Guide in the instructions above 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.

  • This is not a physical/shipped product.  This upgrade requires you to send us your ECU for re-programming. You will be emailed a download link with detailed instructions after adding this to your cart and checking out.

  • You must fill out and include a copy of the ECU Information form along with your ECU upon sending it in. Please contact us if you need to send the form in any other manner.

  • Fabspeed Motorsport saves your stock/factory ECU settings so that you can revert your vehicle back to stock settings at any time.

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.