For the new guys here, the muffler and components from the engine down are all Polaris crap. The catalytic converter is on the section attached to the big ball of metal. The reason to eliminate the big ball call muffler is to eliminate the heat put from the ball to the plastic piece on the passenger side. If you are in Florida or a heat state, that big ball can melt the plastic and make the sorrounding area to crack. You can take the section that have the catalytic and make it hollow or get that piece already make without the catalytic. You can use that and get it to a muffler shop to get it fit to receive a pipe and make the right modification to extended to the back of the SS. No matter what way you go, those pipes will get hot so make sure you use the right stuff to wrap it, also you will need a resonator box or a muffler combo to add to your set up to the rear.
we try a borla magna flow, flow master and the noice was to much, we even try the Bassani muffler and it last less than four month before crack. Note: no muffler shop will deal with a SS unless you paid a lot of money