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PERRIN Performance™ WRX rear end links will increase the feedback and feel of your rear sway bar. Choosing the highest quality components, PERRIN™ end links are the essence of high-end suspension. Here is why PERRIN stands out in the crowd...PERRIN Performance™ has just developed a polyurethane spacer, which make our end links perform with the best characteristics of both urethane and bearing style end links.Constantly improving our design, PERRIN Performance™ has developed a new polyurethane spacer, which locks the spherical bearing upright maintaining end link alignment. PERRIN™ end links solidly bolt the sway bar to the control arms. Loads are instantly transferred through the non-compliant spherical bearings increasing the "feel" when driving. PERRIN Performance™ end links are precision cut from virgin aluminum ensuring strength, durability, and crisp sway bar response providing maximum performance and feel from your rear sway bar. PTFE Teflon lined spherical bearings are pressed in to each end and held in place by a specific press technique developed by our research and development staff. During the installation the walls of the bearing-retaining surface are compressed onto the bearing in a double "swedge" technique making it impossible for the bearing to be removed once installed. Our spherical bearings are made from fiber reinforced, engineered plastic. With a static radial load resistance of over 5,000 lbs these bearings are virtually indestructible. An inner Teflon lining dampens against noise and vibration as well as keep dirt or road grime out of the bearing race. Our choice to use spherical bearings allows PERRIN™ end links to conform to dramatic angles while maintaining a solid link between the sway bar and control arm. Total misalignment angles can exceed 14 degrees. Do not be fooled by other products, which offer spherical bearing end links. The research and development time into this part far exceeds any other end link on the market.