When I look under my car, it seems that there is a 3rd cat with a (2nd) oxygen sensor in it. And worse yet, it seems that this cat is welded to a short piece of pipe that is welded to the resonator. Immediately in front of the 3rd cat are the "spring-loaded" bolts with a flange that connect to the flange behind the second cat. This whole setup looks identical to that described in a previous post:
Can anybody explain to me why this is, and how I get this fixed without spending hundreds of $$ on a piece of pipe with a 3rd cat in it (how many of these do you need?). As far as I can tell the whole thing is original and it is NOT a CA car but a regular mid-west model. The existence of the 3rd cat was confirmed by the Midas guy I asked about it.