I haven't gotten around to testing rolling resistance yet, but I did install an Ultra Racing rear anti-sway bar today. I bought it from Evan at NextGenTuning in Clearwater, Florida, USA. It took me an hour and 15 minutes to install, start to finish. This included unwrapping the bar, cleaning crud off the mounting areas of my car, installation and putting tools away/cleanup. The installation was simple. Most of the time involved was getting tools out, prepping the car and cleaning up. I followed gls2001's DIY steps and they were very helpful (thanks again).