I got a Waldrons exhaust system. If you use there muffler on a turbo go with there full Impostor muffler. It is not loud with going through the turbo also. It is the best flowing muffler like a turbo needs.
Also, If you go with Waldrons let me know. I have not reported back to them yet on my project. There is a small detail that they need to change on there dual outlet mufflers. I will try to get back to that project soon so they can know the information.