The item is composed of very strong rubber with metal inserts to allow the bolt to run through smoothly. The bushings will decrease juddering of your rear end in turn leading to a more consistent and reliable handling ability for you and your car.
They are an excellent replacement for your worn out units and come highly recommended for any FD3S owner on the drift or circuit scene.
You can pick up all of your specialized ATTAIN parts with RHDJapan!!