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My 95 had a crossover like my 96 when I bought it. And as far as I could tell it was stock. The car had 24,000 on it when I bought it in 99 and the car was completly stock I was told.
The LT4 exhaust has an H-pipe after the resonator.
But I think the question is about the resonator itself, which is do the two sides of the exhaust somehow mix inside the resonator or are they kept in separate chambers. Or another way of asking is does the resonator in anyway act like an x-pipe or h-pipe. I don't know the answer but it is a good question.