This is the unit I was referring to in the above post. It's listed as a cat-back system, so I guess, generally speaking, anything from the cat back is considered a cat-back.
Sometimes they list axle back systems which I guess can be considered a cat-back as well. Although still somewhat confused, I ordered one of these for it's looks, simplicity of installation and sound. It wouldn't be the first mistake I've made if it doesn't do it for me.