Not much differnece in turbo back and cat back, the cat is bolted to your turbo. Most companies probably would consider this the same, but a true turbo back would have a cat delete, or a test pipe, which makes the cat dissappear. With out a cat you will get the turbo to spool up a bit faster and get a little extra power out of it, but everyone will tell you you are desrtoying the planet one hydrocarbon at a time. Are you looking to build some type of exhaust or just want to purchase an aftermarket kit?