I picked up a set of Summit's sway control for 2 1/2 leaf springs and put it on and really have to agree with what they advertise. It says up to 40% better handling and it really made the truck feel tight and secure and can take corners so much better.

I am not to sure if there is a downside to the setup. I put it on my Z56 police edition tahoe which I lowered in the rear so that it would sit level thus causing me to modify the part just by cutting the threaded u-bolts so that they do not come in contact with the floor of the truck.

No just have to upgrade the front sway bar end_link_s and bushings to poly so that it will match the rear. You can feel the truck is tighter in the front than the rear.

Wish my camaro only needed 40 bucks to make it corner better but it took about 700 for really nice setup.

No joke guys this part works.
Part number is sum-720004 $39.95


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Summit sold out of these since the post was originally created. The only other place that I have found that still carries that same product that all seem to have had great success with is this site
http://www.autopn.com/autoparts/swaycontrol/index.html

Price is higher than summit but results are going to be positive.