Audi A6 / S6 / RS6 A6 / S6 / RS6 C7 (2011 - 2018) Rear Lower Track Rod Outer Bush - PFR3-715 PFR3-715 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!