You can find the chip tuning file for your Chevrolet Silverado 2007 - 2014 6.6 V8 397hp 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 Chevrolet Silverado 2007 - 2014 6.6 V8 397hp vehicle is the result of a special product by EcuPrime Engineers. In addition, we can increase the power of your vehicle from 397 HP to 440 HP, 1037 Torque to 1100 Torque.