Interesting sway bar article from UK.

[bchurch05]

Originally Posted by X5girl

Whilst the links look great on the post by Icer006, they will not last on a road car because the ball joints are completely exposed to the elements. These are race parts meant for limited mileage and VERY regular inspection.

This type of joint, known as a "rose" joint needs rubber seals fitted either side of the joint. Like the lower joint on this sway bar link.

i have to disagree with you here as i can tell you from experience that a good quality "heim" joint like those made by QA1 will hold up just fine to even the worst road conditions. i have adjustable sway links that i built on my dodge 3500 with a plow and sander that goes for about 20hrs everytime it snows and i have had them on for 2 yrs which is 4 times as long as a OEM link lasted.
do they look new? no
are they still tight and functioning like they should? yes

i am intrigued by the rubber seals that you posted have never seen them before. happen to have a manufacturer or supplier.