I’ll just chime in once more and point out that I googled the Diverter failure and it seems more like a N54/PWG issue. Most OTS and tuner maps aren’t running 18psi on the stock turbo.
I was reading a thread this morning on a turbo inlet - that would be where my money goes. 20hp in the top end would be awesome.
https://f87.bimmerpost.com/forums/sh....php?t=1649488