StreetGRIP Delrin bushings eliminate deflection and stiction resulting in significant handling and ride quality improvements. Complete set of upper and lower bushings. Self-lubricating Delrin material is far superior to OEM rubber and poly bushings. OEM Rubber bushings suffer from deflection when new. Over time, rubber bushings deteriorate and can sieze resulting in stiction. Poly bushings resist deflection, but require regular lubrication or they will squeak and cause stiction. StreetGRIP delrin bushings never need lubrication, never sieze and have an exceptionally long service life with zero maintenance.