BMW 5 Series E39 (1996 - 2004) Rear Subframe Mounting Bush Insert - PFR5-531 These inserts fit into the original bushes on the subframe to limit the movement. For complete bushes use PFR5-530 - NOTE: Price is for CAR KIT, NOT per bush… Powerflex price their bushes individually, but we have combined the quantities to make it simple!