You can find the chip tuning file for your Porsche 911 2004 - 2011 ( 997 ) Carrera GTS 3.8i 408hp 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 2004 - 2011 ( 997 ) Carrera GTS 3.8i 408hp vehicle is the result of a special product by EcuPrime Engineers. In addition, we can increase the power of your vehicle from 408 HP to 425 HP, 420 Torque to 445 Torque.