anyone heard or know anything about these little doo-hikey's

http://www.jcwhitney.com/product.jhtml?CATID=176719

 

I had those on my 99 xlt... dont do that much. They cost me more to have installed then to buy them, could have done it myself but I was getting a bunch of suspension work done at the time and just let the mechanics do it. I would say pass them up, they are very visable when installed and just dont do what you would think they would for wheel hop or leaf wrapping.