Powerflex Polyurethane Bush kit for Porsche 911 Classic (1977 - 1986) Rear Anti Roll Bar Bush 18mm - PFF57-209-18 - For 911 Classic models 1977 onwards only. For 911 Classic models 1974 to 1977 use 4 x PFR57-412-18. Please measure anti roll bar diameter before ordering. - Bush Size: 18mm - 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!