I recently put exhaust cutouts on my 02 gt, with that being said a lot more air is going into the system.
causing hanging rpms, should i use my sct x4 and tune it to use more fuel to match? or just leave it as is

 

depending on how close the 02 sensor is to its new found exit you should probably ditch the dump truck cutouts and run a proper exhaust system

in the meantime enjoy your angry neighbors and loss of power lol