What car do you have?
If you have a mk5 gti, you can get a complete turbo back exhaust (from the turbo to the back of the car, also known as TBE, turbo back exhaust)
Or you can get the 2 seperate parts that make the whole TBE, so you can get the high flow down pipe + sports cat (from the turbo to the center of the car) or you can get the cat back exhaust (from the cats to the exit)
Hope this makes sense,