Ive been running Cajun B pipes for 2 years ~ 25k miles and pass MD smog no problem with the high cell cats. Yes its a little pricey (although not at all compared to many MANY other v8 header/ mid pipe packages) but it works incredibly well.
They are bolt in mid pipes, depending on y-pipe back setup you might need to figure out mounts, but if the aftermarket exhaust is stock flange fitment it should bolt right up. The "B pipes" aka mid pipes contain the cats. They Cajun packages uses the JBA long tubes, so the cats are no longer integrated to the headers, so if they need servicing later they can be replaced from underneath the vehicle without having to touch the headers themselves. It also clears up a little bit of room around the side of the motor. This was the ONLY reason i didnt have to lift the motor to replace the STUPID coolant hose running out of the front driver side of the motor right in between the front header runner and back of the AC.As far as JBA's it is unclear if the option for long headers then welding CATs to the B pipes or using shorties with CATS welded is the best option, either one will require welding which my installer can do but I would prefer not to have to do that