Audi A8 / S8 A8 / S8 D4 (2010 - 2017) Rear Lower Track Rod Outer Bush - PFR3-715BLK PFR3-715BLK is a reinforced replacement bush to revitalise bush performance and provide stability to the rear suspension. - NOTE: Price is for CAR KIT, NOT per bush… Powerflex price their bushes individually, but we have combined the quantities to make it simple!