Audi A4 / S4 / RS4 A4 / S4 / RS4 B8 (2008-2016) Rear Subframe Rear Bush - PFR3-732BLK This is a full replacement bush. For an insert that fits into the original bush OE number: 8K0505145C please use PFR3-733BLK. For an insert to fit the original bush OE number: 4G0505145C, please use PFR3-735BLK. - NOTE: Price is for CAR KIT, NOT per bush… Powerflex price their bushes individually, but we have combined the quantities to make it simple!