Powerflex Polyurethane Bush kit for Porsche 911 Classic (1965-1967) Rear Anti Roll Bar Bush 16mm - PFR57-412-16 - Please check anti roll bar diameter before ordering. - 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!