Powerflex polyurethane bushings are designed to decrease the amount of deflection in your car's suspension for better handling, driver feedback, and tire wear. Powerflex uses premium polyurethane materials for minimal NVH (noise, vibration, harshness) and increased longevity over the stock rubber bushings. The quality of Powerflex products can be seen the moment you open the box: premium polyurethane, detailed moldings, lube holding grooves and knurls, and 304 stainless sleeves. Each kit is supplied with a copper-based grease for extended squeak-free operation. In many applications (if noted in diagram), we have polyurethane engine/drivetrain mounts and reinforcements to reduce movement for better throttle response and more power to the wheels.