I have a "01" Mustang GT and I have a question regarding mid pipes. I notice that the stock "H" pipe has four catalytic converters, if I installed a 2 1/2 inch X pipe with welded in magnaflow catalytics on each side would I still have to use MIL eliminators ?Since Im going from four "cats" to only two "cats"? I was told that you only use MIL eliminators when you're running no "cats" at all. Any input would be greatly appreciated.