Gypsy Leaf Spring Bushings.

Leaf Spring Bushing Set , Be in control of your suspension while you're maneuvering through turns, doing drag-style launches, and braking. OME Suspension Leaf Spring Bushings are made of polyurethane, which is harder and stronger than rubber, but still not as hard as solid metal.  

Full Set Of 16 Small and 8 Big Bushes for all 4 Leaf Springs,