I have been doing LOTS of research for my build and was told that I need to run dual wastegates to get the best results... I was told that running two wastegates will cut down on back pressure, allowing my turbo to spool quicker.
I am going to run a GT4088 Garrett turbo pushing 20psi+... The manifold I found to accomodate the dual wastegates is LoveFabs Excalibur manifold... Someone please clear this up for me because my best friend told me that I would be fine with a single wastegate with a stiffer spring.