AG11v6SCC

I need some help with this inTune i1000 that im using on my 11' mustang v6. I tuned it with the 91 octane and it was running fine until i installed the headers and x-pipe. it has shut off on me while on the fwy but not sure why. does anyone have a tune that can help me with this issue. The WOT Fuel is at an even 0 now, the MAF is +15 percent (not shown). 3.73 gears with BBK Longtube Headers w/x-pipe no cats, stock exhaust mufflers. No other mods.