Powerflex Polyurethane Bush kit for Audi A4 / S4 (B6) 2001 - 2005 Rear Anti Roll Bar Bush 16mm - PFR3-210-16BLK - - Bush Size: 16mm - 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!