Megan Racing Rear Upper Arm Bushings for Infiniti G35 03-06 - MRS-NS-0304Factory bushings are made from rubber compound, which deteriorates over the years. OEM bushings become softer, therefore becoming less capable of resisting the forces being placed on them. Megan Racing bushings on the other hand are 20% 30% stiffer and do not deteriorate in performance over time. The benefit of the increased stiffness will improve driver control of vehicle. Fit Infiniti G35 03 06 Coupe or Sedan 150% Harder that stock bushings Made