Powerflex Polyurethane Bush kit for Porsche 911 Classic (1974-1977) Front Anti Roll Bar Bush 20mm - PFF57-403-20BLK - Please measure anti roll bar diameter before ordering. - Bush Size: 20mm - 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!