Powerflex Polyurethane Bush kit for Citroen C4 (2004-2014) Front Anti Roll Bar Bush 21mm - PFF50-603-21BLK - This bush replaces standard bush part number 5094.87. Measure bar diameter and select correct size for your car. - Bush Size: 21mm - 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!