You can find the chip tuning file for your Porsche 911 2011 - 2015 ( 991 ) GT3 3.8i 475hp 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 911 2011 - 2015 ( 991 ) GT3 3.8i 475hp vehicle is the result of a special product by EcuPrime Engineers. In addition, we can increase the power of your vehicle from 475 HP to 500 HP, 470 Torque to 470 Torque.