This is the whole email I got from Adam,
Your only option would be the GTX2860R that we listed up yesterday with our custom wastegate actuator. Here is the link in case you didn’t see it:
https://tuneplusinc.com/collections...en2-bolt-on-turbo-kit-for-2014-ford-fiesta-st
The RT-330 is having issues and I’m in the middle of disassembling one of their turbos to find the root cause of the issue and provide a solution. In my opinion once we have a solution REVO is probably going to go dark and all these customers are going to be out of pocket to fix their turbo.
If you decide on the GTX2860R Gen 2 you can buy the Unlimited tune on our website at the same time and it will cover any fuel you want to run, as well as methanol injection.
If you want to get the most out of the turbo you will want to get a port injection kit as well so we can run additional fuel. The methanol injection will take us from a stock factory fuel system limit of 290-300 to about 310-315 but it really needs port injection to cover all the extra fueling needed to run 25psi+ with this turbo.