I have A troyer tune on SCT 9100 coustom tuner.I already bought new plugs ngktr6 not instaled yet but did put on K@N fipk and will be puting a full headers two hi flow cats and mag 15772 cat back. I am seling my old 4x4 the money is for my hd my warenty expired july 31 so now I am talking to people and learning as much as posible thanks for all the help.