ive got an 02 with a 5.4 that has front and rear cats on it prolly related to that LEV crap.......but i was wondering if the rear cats could be removed, and the rear O2 sensors relocated, without the MIL lamp coming on. so if anyone done this before please let me know!!

 

nope... rear cats are the only true cats u have the pre's are just to keep the flames are large particles out... u will need Mil eliminators