This upgrade must be ordered when initial A-Arms are ordered. This is a modification internally structured into the A-Arms
Spherical Upgrade for Short Course Application.
Ball joint verses spherical
Better locking mechanism
Retains factory geometry/angles etc.
Weak link in case of crash, repairable without doing further damage to rest of vehicle
Stronger design depending on bearing and bolt sizes
Requires more maintenance as it is bolt and nut verses circlip
It being stronger may transfer load or impact to steering rack or spindle , more expensive to repair etc.
spherical bearing offered if requested but it is not common or recommended