Hello, I'm Nick and I am currently trying to figure out everything that I will be needing to rebuild my engine(N54 2008 135i 8 Bolt Manual @174,XXX Miles) to OEM Spec. I am Planning to get Hydra HP650 Turbos and aim for 550hp with headroom. To my understanding, the stock n54 motor with no...
From their IG today.
Word is they're trying some new stuff with the valve springs that will trickle down to N54/55 if it works out.
Any important info / details to ask about their setup? I know nothing about valvetrain stuff