Catted SLP x-pipe + emissions laws = pass or fail?

By definition if the pipe has cats on it, it should be legeal somewhere. In Washington though I do not know, I would call a local garage and ask them about it. Most legit places will not install it without saying something about the legeality of the pipe. I know when I asked to have my cats taken off they had a fit because the shop was in Louisville where they had emmission testing.