Red Flag on exhaust mods

I'm ditching the converters on a 2007 gt mustang, And a 2007 gt500. This being a first exhaust job involving knocking off the converters on a 2005 and up mustang, they have a diablo programmer that says it can turn off the " downstream " o2 sensors and " should run fine " no check engine light, Low fuel millage , loss of power, ect. so can I knock off the converters, download the program, weld everything up and off they go? one more is the sensor that is in the converter will that be a problem with the converters missing? Thxs EP429

Ok sounds good. From what the Diablo programer shows me that you have the option to "turn off" the down stream o2 sensors by slecting that before you upload the tune. The Diablo programer has a "factory performance tune" or you can take that tune and "modifie" the settings form Diablo. Also The guy I talked at Diablo said that I can tell them the make, modle, ect, whats been done to the car headers ,supercharger,ect and the will write a "custom tune for your car. Them send it via E-mail get a cable, radio shack has it by the way. and you upload it from you computer. he aslo said that converters shouldn't be removed blah blah blah. and didn't give any info on ditching the cats.