I'm trying to plan out what i want to get done to my 2016 B8.5 A4 performance wise. I plan on bringing it up to ~400 whp but i haven't been able to find any reliable information on if I can bring it up to that level and beyond. I don't know if i'll need to build out my bottom end, get a new differential/CV axles, etc, to get it to that power level or higher.

Thought i'd ask rather than find out the hard way.