STi ball joints?
 

Has anyone ever tried to fit the JDM WRX STi control arm ball joints on their twin? Part #20206ZR100

https://www.japanparts.com/parts/detail/?id=61311
https://www.japanparts.com/image/ima...&sx=590&sy=393

The "BRZ tS and STI parts List" thread has WRX STi (GR) front and rear control arm bushings listed as compatible with our cars, but nothing listed for ball joints.

Front bushing: ST20204ZR000
Rear bushing: 20204ZR010

https://www.ft86club.com/forums/showthread.php?t=84332

It doesn't look like it - the FCA balljoints are inverted compared to ours and the STI ones appear to be retained in the knuckle by a bolt, whereas ours are press fit into the control arm.

Dang it this is kinda what I figured. Thanks for the information though.

My ball joints have 170k on them but they look normal! Would feel like a fool if looks were deceiving and I swapped out the other 4 bushings and not these.