What is this gold ball on the S15 subframe?
Your picture does not work, but I’m assuming you mean this one?
If so I have no idea.
No body knows? This seems to be on all JDM S14 and S15 subframes…
I’ve seen them before, but only on the bolts that allow for adjustment. That one I believe allow you to adjust camber slightly. I could never come up with a theory that made sense…
-Martin.