Powerflex Polyurethane Bush kit for BMW E39 5 Series (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 - Bush Size: - PRICE IS PER CAR KIT, NOT per bush. Powerflex usually price their bushes singly, but we have combined the QTY and price to keep it simple for you!