Are you talking about the atr down pipe with the delta gate up top by the turbo? If you are then you will need another delta gate. One will not be enough. Ask me how I know.
Which Downpipe? I have teh DP301 Downpipe and a t-72 turbo. It fits fine and I'm one of the lucky ones so far with their wastegate (6 years now and still working - knock on wood).