Powerflex Polyurethane Bush kit for BMW E53 X5 (1999-2006) Rear Anti Roll Bar Mounting Bush 23.5mm - PFR5-4609-23.5 - Please check anti roll bar diameter before ordering - Bush Size: 23.5mm - 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!