[misnomer]

The name on the exhaust doesn't matter so much as how it's built. Mandrel bends, and as few of them as possible, are the main things to making a good exhaust (n/a can have a lot more to them, but you asked about turbo). As far as the sound goes, you can cut back on it a bit with a decent muffler and by packing around the pipes with fiberglass (like you see on your factory exhaust).