Installed them my self, along with the rears and my springs. Those seem fine, only problem was the front passenger side link of the sway bar. The thread looks fine, its as if the bolt just unwound itself over time. My car did handle a bit worse, but i am at 0% thread on my tires so i figured that was the reason it wasn't as planted going around 65-70 on the highway. Just glad i found this now, luckily i was doing my own oil change, if not... i would have never known about it. I too was skeptical that i did not hear anything bang around, or anything loose, really weird thing to happen and not notice a difference.
From the responses, im just gonna go ahead and get the SPL endlinks, it'll take care of the rears knocking and possibly help my sway bar from falling off again. Thanks for the help.

 

Actually it was, car handles great. And it was half a sway bar lol. Thanks for the sarcasm

 

Oh you can count on me for sacrasm !

 

Half a sway bar. I don't want to get in trouble for a disrespectful post but the way a sway bar works is linking both sides together its all or nothing. So if one side is pushing up what is pulling down on the other side. So don't defend yourself with really stupid comments, while calling someone else sarcastic. Unless half a sway bar was your horribly pathetic attempt at humor. Oh and to answer your question do you need upgraded endlinks. Well if the stock one wasn't hooked up and you think the car handled well. NO!

 

Thats all i read =]