It does have a bung -> it will fit? Cool! Is it that OBD1 cars only have the sensor on the header and OBD2 cars have it on the header AND cat?

Does anybody know why DC Sports at least would have a diff model # for each (though the catback is the same) and would you have any info on whether this is the case with other companies?

I guess it's looking more likely like i will get it, but that would suck if i do and then find out theres a little part that won't fit like the O2 sensor wire doesn't reach or something.