Powerflex Polyurethane Bush kit for Porsche 911 Classic (1974-1977) Rear Anti Roll Bar Bush 18mm - PFR57-412-18 - Fits models 1974 to 1977, from 1977 on use PFF57-209-*, *measure anti roll bar size. - 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!