So, my exhaust system desperately needs replacing. It is such a rusted POS and its been cut and welded like a half dozen times. I'm not even sure what the original exhaust system would look like. So my questions:
How many Cats should this truck have? Did the original exhaust system have 2 Cats on the Y pipe, or was it 1 or 2 Cats further back under the Cab? Or both? Anyone have the PN for the 02 sensors as well?

 

Can anyone confirm that this is the schematic for the 01-02 3.0L Flex Fuel Ext Cab?