Just need to know what is out there to turn off the rev limiter, governor, and oxygen sensor at the catalytic converters.
want to disable the O2 sensors b/c the sporttrac comes with a ridiculous exhaust system, it has to meet Ca emissions standards,anyway l wanna replace the catalytic converters with one high flow one. the aftemarket one will not read the same and will set the check engine light off when the vehicle is on. l could drive around with the C.E.L on but then l would not know when something is actually wrong.
already have the catback exhaust, dual catback.

Why would you want to shut off the oxygen sensor? The computer needs that information to control the engine.

Check w/ Diablo Sport,see if they make a tuner that will allow you to turn off your rear O2 sensors.Instead of replacing just the converters,replace the entire exhaust w/ an aftermarket catback.You can buy these exhaust systems w/ the converters already part of the system,plus the mufflers are less restrictive and have a much deeper tone than your factory mufflers.Hope this helped,good luck.