I bought a 99 323i recently and want to do little performance mods.
So I've been doing some research and it seems like the first thing people are saying to change is the intet manifold to the M50 and BBTB. From what I was reading they were posts from 2-3 years ago.
Is this still the way to go or have things changed?
Also your opinions on what mods to do and not do. Brands I should stay away from and brands to look at. This is my first BMW and I want to do it right.