Audi A7 / S7 / RS7 A7 / S7 / RS7 4G8 (2012 - 2018) Rear Lower Track Rod Inner 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!