Audi A5 / S5 / RS5 A5 / S5 / RS5 (2007-2016) Rear Diff Rear Bush Insert - PFR3-743 This is an insert that fits into and fills the original voids in the original bush. - NOTE: Price is for CAR KIT, NOT per bush… Powerflex price their bushes individually, but we have combined the quantities to make it simple!