Originally posted by DemonSVT:
Stock ones are a composite material with integral ball joint sockets. (no rubber to deflect)
How are you going to upgrade from that?
You can replace the stock rubber "bar to frame" bushings with polyurethane.
I will warn you it is a major PITA!!! However the results are quite pleasing...
This is another case of an improved part. The early links were a thin steel tube with end joints that wore out and rattled after 30k. If your car is older (98? 99?) check to see if you have the old style and upgrade to the new composite ones.