You'll also need to remove the porcupine wire holders from the engine side of the liner to free it to move down, out of the way to access the IDM. There are 4 8MM bolts and 4 7MM bolts holding the liner on. On the Superduty, the IDM is located on the driver's side, behind the fender liner. In this article, I'll add my personal experience and back it up with dyno proven results. It's been widely discussed that raising the output voltage of the IDM will improve performance but the exact effect is not so well documented. Please read all the instructions before starting. By following the instructions for this modification, you acknowledge that you have the skill and experience to complete this modification and accept full responsibility for any damage that may result. During the process of doing this modification, electrostatic discharge safety procedures must be observed in order to protect static sensitive devices. This procedure involves modifying sensitive electronic components - any number of which, if damaged will completely ruin the IDM which can cost anywhere from a couple hundred to over $400.
