Description
Fabspeed XperTune for the 955 Cayenne S enhances the 4.5L V8 with more power, torque, and improved throttle response while maintaining OEM-level drivability and reliability. The included handheld connects through the OBD-II port, removing the need for bench flashing by refining sensor inputs and air/fuel ratios with a simple flash.
![Fabspeed XperTune Performance Software for 955 Porsche Cayenne S [FS.POR.955V8.ET]](https://diamondusedparts.com/wp-content/uploads/2026/04/fabspeed-xpertune-performance-software-for-955-porsche-cayenne-s.jpg)





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