goro
New member
It's been said before but it can be said again so here is my understanding based on past threads:
The 555 stamp is NOT an indication of any brand. And It is NOT an indication of OEM quality ball joint.
It MAY be an indication that the aftermarket parts company used an OEM steel cast when replicating the LBJ part.
However this really doesn't mean anything about how safe the actual ball joint is against failing because when Moog (or whatever brand) fails it isn't the cast steel of the LBJ but rather the non-OEM rubber joint that fails.
The bottom cover of the joint itself is 555 as well, for what it's worth.