You can find the chip tuning file for your Porsche Cayenne 955 - 2002 - 2007 4.5 V8 Turbo 450hp vehicle on our site. These files are created especially for you and handed to you. All our Tuning files are extensively tested on Dynometer. The development of the tuning file for your Porsche Cayenne 955 - 2002 - 2007 4.5 V8 Turbo 450hp vehicle is the result of a special product by EcuPrime Engineers. In addition, we can increase the power of your vehicle from 450 HP to 500 HP, 620 Torque to 750 Torque.