these are the knuckles from the GTI Clubsport S. They provide an extra degree of negative camber. Pretty much every other way of achieving more negative camber on our cars (camber bushings, strut mounts) has some significant NVH and/or additional maintenance aspect to deal with, with the *possible* exception of the TTRS lower control arms (but they have some geometry challenges themselves).
This is exactly the same knuckle as the R/GTI come with except for some minor machining changes to achieve that extra degree of camber. Because of that, there's ZERO NVH penalty, no additional maintenance, and no weird fitment issues to deal with.
(I'm trying to get my car to handle as well as possible with minimal NVH sacrifices - RS3 LCA bushings, these knuckles, not going overboard on spring rates, etc.). There are cheaper and easier ways of getting the geometry and handling characteristics I'm after, but you give up a lot more to get it.