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On the '94 four-banger are we looking at 2 cat converters? I've gone through the online shop manual and on the '95 there is something called a "warm-up three way catalytic converter" right below the exaust manifold. Then you've got some pipe and the cat that looks like a cat, then more pipe, the silencer, and finally the muffler. The clowns at M******* Mufflers are telling me that both cats have failed and they have no idea where to get a new "warm-up cat"

Is the "warm-up" cat really a catalytic converter or what?

And, if it is....any idea where I can get a new one? I've been looking and the second one is no big deal, but the warm-up cat is a ghost.

Any help will be greatly appreciated; I want to get another couple hundred thousand out of the old black roach.

Sorry dude never heard of it. When I toook my engine out I only saw one cat and I have a 95.

mine has the same thing is the three way warm up cat right after your down pipe? mine goes headers, down pipe then that cat then another piping to the big cat. not sure why its there

Cat needs high temperature to work efficiently - At cold startup the cats are not warmed up so they just let emissions through. The warm up cat warms up fast because it is close to the manifold - so it takes care of the emissions before the actual cat gets up to operating temp. As far as i know - the warm up cats were a requirement only in california not anywhere else. So you can probably drill it out and use it as a straight pipe. For the other cat - you can get any generic $20 ones and have a exhaust shop weld it in there.

just get a new aftermarket header, they replace the warmup cat