I dont think this has to do with actual pcm tunning but it still has to do with tunning its self just wanted to get that clear, now since i have been moded and i have got myself to the 3.4 with supporting mods stage, i am gonna be needing to do some tunning, now scotty(syntheticshield) has sent me on the right path to get my pcm tuned or whatever by overkill motor sports, which will is a verry nice guy to talk too anyways i told my friend what i want to do next which is slp headers and a zzp stage one tb, and i want to drop my pulley to 3.3 but he told me i should be doing some good tunning, now that's where i am lost, so basically what is tunning, how does it work, what do i need like an hp tunner, and can any average joe do it right ??? Thats where im at. Thanks for taking the time to read this.