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one
There are two catalytic converters on the 1998 ford explorer.
There are two catalytic convertors on this model.
2
Two.
there are 4 left manifold ,right manifold, before catalytic and after catalytic
Look under the vehicle and count them.
There are 2 of them.
There are four. Two on the upstream (before the catalytic) and two after catalytic converter (downstream).
4. Two in the front, two in the back.
One.One.
2, one before and one after the catalytic converter