Audi A4 / S4 / RS4 A4 / S4 / RS4 B8 (2008-2016) Rear Subframe Front Bush Insert - PFR3-731 This is an insert to fill the voids and limit movement in the original bush. For the A5, it fits the following subframes only: 8K0505235AA, 8K0505235AL. For a full replacement bush, please use PFR3-730. - NOTE: Price is for CAR KIT, NOT per bush… Powerflex price their bushes individually, but we have combined the quantities to make it simple!