This just maybe my Car, but I have 2 cats. And to replace them is actually 2 pipes (pieces) which can run ya 600 CAD. You can't disesemble a cat itself (well not to my knowledge). By judging from my car you have to undue the Front pipe (to manifold) and undue it at the muffler connection. Now some told me to bang the living crap out of the cats to gut it. However, I am making a custom straight pipe out of 2" pipe and no even going to have cats on my exhaust system. I hope this helps you. Perhaps I'll take pics of it when I'm finished tomorrow.