Designed to fit a 30 mm sway bar Nolathane bushings come with a knurled ID specifically designed to retain grease. Sway bar Link bushings or grommets are the connection between your sway bar and chassis. Worn bushings can effect the vehicle handling and cornering performance, they are easy to install and are backed by a limited lifetime warranty. Nolathane bushings are made from the highest quality elastomers and designed to synchronize your suspension system for optimal safety, handling, performance and ride quality, longevity and reduced maintenance. They are the most positive link between your vehicle body, springs, struts, arms and shocks.