Up for sale is my TS Performance MP-8 module chip for 2004.5-2007 Duramax engine! It plugs directly into the map sensor and fuel pressure sensor without any modifications other than switching out the fuel rail bolt which I also have. I have the control knob for it as well which plugs right in so everything you need is there. The only reason for selling it is because I came across a complete programmer for the truck it was on and I don't need it anymore. New these go for $535 on xtremediesel but I no longer have use for it so my loss is your gain. Please feel free to text me anytime or call after 6! Thanks for looking!