So recently I did the 5 lug conversion on my base model kouki and I ran into a really confusing problem with the front hubs.
This is how my front 4 lug hubs looked like when I pulled them off.
When I tried to put the 5 lug hub over the spindle it would not sit all the way in. It wouldn't fit over the ending part of the spindle. There was a piece that sat inside of the bearing that was fairly easy to hit out and it ended up sitting all the way in after hitting it out.
This is the piece that I knocked out and the hub fit right over the spindle.
After reinstalling everything back together, the wheel shakes up, down, and side to side. I read that the piece I knocked out of the new hub is supposed to stay on but looking at my old 4 lug hubs, they were never there.
I bought my kouki all stock around 2 years ago and from what I see someone must've installed it without that piece that goes inside the bearing since it's supposed to be there. That means that my car was being driven for years without that piece.
Now do I just look for another 4 lug/5 lug hub with that piece to put on my new 5 lug hub? Btw these 5 lug hubs are from ebay and made to fit stock s14 knuckles and I've seen a bunch of people run them without any issues installing them.