You can find the chip tuning file for your Pontiac GTO 2004 - 2006 6.0 V8 400hp 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 Pontiac GTO 2004 - 2006 6.0 V8 400hp vehicle is the result of a special product by EcuPrime Engineers. In addition, we can increase the power of your vehicle from 400 HP to 420 HP, 542 Torque to 570 Torque.