I have an extra 400 cell ceramic catalytic converter, like in the picture (new unused unwelded) that I didn't need to use and left over. I had the other one welded onto my ypipe for passing emission with my test pipes. The numbers for pollutants were low (all under 1.0 unit, and some were nearly 0.1 unit), anyway with test pipes on I passed smog easily with this mod.
Anyhow, I have a ypipe and midpipe left over that I can weld the remaining cat on to either for you to pass smog (not california most likely unless you have HFC on there already - but check local testing facility's stringency) and not have to deal with the demon bolts from hell on your headers. Just swap out the ypipe or midpipe (1/2 hour work) and you pass smog.

Total shipped $200 for the ypipe plus cat.
Midpipe + cat shipped $225.

You will get a good used ypipe (midpipe) plus new cat welded on after you let me know which one you want. This thing will last forever assuming you swap out for smog every couple of years.

LMK

 

ttt

 

obo