The WORKS Urethane Suspension Bushings will firm up all of the front and rear suspension points as well as the rear differential (all of which are originally mounted using traditional rubber that is more pliable). These may not provide the same level of comfort as the stock rubber pieces, but will give the driver a more direct, responsive feel for the serious driving enthusiast.WORKS bushings are constructed from medical-grade urethane with minimal porosity and the highest durability of any automotive bushing available.Includes one pair of WRP* rear upper control arm (inboard, foreward) urethane bushing w/ grease pack. The full WRP Urethane Suspension Bushing Kit is also available.Application: '03-'06 EVO VIII/IX including GSR, MR, RS and SE*WRP (WORKS Racing Program) items are engineered to provide increased performance and may not be intended for use on public roads. Because we expect these products to be put through some extreme situations, certain items may not qualify for the WORKS Factory-matched Warranty.**This item has a manufacturer drop-ship fee of $10**