Prepare your semi truck to be Ready for the Road Ahead , with the Hendrickson Rotating Shim Type Bar Pin Bushing Service Kit that minimizes suspension friction. Due to its ability to update the suspension bushings that separate mechanical components, this replacement kit is the ideal kit to decrease overall wear and tear. Each kit includes a number of key parts such as shims to offer precise and speedy alignment. FleetPride is your First Click in Heavy Duty .