You can find the chip tuning file for your Pontiac Grand Prix 2004 - 2009 5.3 V8 303hp 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 Grand Prix 2004 - 2009 5.3 V8 303hp vehicle is the result of a special product by EcuPrime Engineers. In addition, we can increase the power of your vehicle from 303 HP to 325 HP, 438 Torque to 460 Torque.