WOW this thread is a getting pretty dumb. Seems like all the OP wanted to know is if sway bars would benefit him and now a vendor wont stop posting about non-related things. Obviously sway bar upgrades exist for a reason, so if you disagree, move on. Its already been proven that they work, with video, and obviously GM changed them for a reason like they stated in their press release which you said they didnt. Relax guy, its not the end of the world if people want to upgrade the sway bars first. Its clear that they work really well, and so do subframe bushings.