Hello, I currently own a MK5 GTI and will be buying a brand new engine from factory (AXX) soon. I am planning to push 400-500HP so I am wondering what the limits of the stock internals are, and which ones I have to change to see such figures. It will be a big turbo setup, most of the parts will be provided from RTMG. I am willing to change every single part of those internals, but id rather for it to not cost more than 20000 dollars in total.
Thank you in advance😁