Ford Mustang (2015-2023) Rear Subframe Rear Bush Insert - PFR19-1721BLK This is an insert that fits into the voids of the original bush. For a full replacement bush, please use PFR19-1725BLK. - NOTE: Price is for CAR KIT, NOT per bush… Powerflex price their bushes individually, but we have combined the quantities to make it simple!