Now considering the nature of a product like bushings, let me just tell you what you need them for. Bushings (when built right) are the answer to poor handling, excessive tire wear and braking instability. They're composed of an advanced version of Polyurethane, produced in house at Powerflex. This advanced form takes this 50 yr old material into the future with added benefits like improved handling, driver feedback, reduced noise and increased longevity compared to your stock bushings.