I was wondering about an internal wastegate on the TD05H I read some where that it is already set to 6 PSI. So I wouldnt have to get an external wastegate I would just have to get a boost controller right.

 

You can get a boost controller to up the boost. Remember though, once you go over 10psi the internal wastegates dont work as well as an external, so depending on the power levels youll be going for, external mite not be a bad idea.