When I bought my Sy I was given a couple of free mods along with the truck. I was given an ATR pitbull chip and a Kenne Bell chip also. It seems to me that the ATR is the way to go. Are these chips Sy and Ty specific or are they able to be used on other vehicles as well? I guess what I'm really asking is should I trust the chip this guy gave me or do I need to try and buy a new one? If I do use the ATR chip How and where is it instaled? I am also still looking for a place to buy additional ATR products, does such a place exist? I amnew around this forum but I am trying to learn. Whats all this talk about two and three bar? Seems to have something to do with the computer?