Here is specifics. I have a 2008 6.4. I bought the Livewire TS 5015 off of Ebay for $900. It was preloaded with five custom tunes. You can search by EBay by typing 'SCT Livewire 6.4' Tuning was done by Mike Shimmack. I think he may have worked for a tuning company previously. Not sure...