Why no external gate downpipes?

[Undercover87T]

External wastegate + tunnel = awesome . Mine is on the crossover on the driver's side so i get the full extent of the noise when it opens. I'll agree it will scare the average person in the car next to you.

 

[TurboTnZ06]

Just get a good local welder and make whatever you want. I've heard the best setup is to wastegate pre-turbo off the header. Precision makes good wastegates to bolt up to pipes. I run a 39mm Precision gate on an old ATR pipe.