The cat converter is welded into the whole downpipe.

You would either have to buy a whole downpipe section with a cat in it or, buy a cat and have a exhaust shop cut the old one out and weld the new one up in the same place.


The downpipe that is rusty brown on top is the cat downpipe, it will look very similar to whats on your car. see how the cat is welded into the unit.