Yes, however they were to my own specs (about the 2nd year of ownership- the truck came with a 4yr/50k bumper to bumper warranty).... In short, we monitored the ecm for about 1 month and then..... increased throttle (pedal) response, the rev limiter was raised 500 rpm, ignition timing was advanced 2 degrees after 1400 rpm, we increased the fuel trim by 1-3% IIRR (it's been a while ago and I would have to look up the specs as they varied with RPM) and we did not touch any of the tranny related functions as the tranny will respond to the engine/etc...….these should not be "adjusted" by anyone who does not have specific knowledge of the safeguards and other factors built into the programming) I also built my own ram air system (using a very crude/old school method of plastic strips to ID highest pressure points under the hood to determine placement of inlet which was at the top center portion of the radiator- and using existing engineering components), twin pipes...I fabbed up my own head and wye pipe..... letting a local muffler shop do the install with 2- 28" long Allied resonators, and built my own rear sway bar (including end links, etc.). Of course I also built my bed cover as well (including the latches)...pics are in m gallery