Powerflex Polyurethane Bush kit for Porsche 964 (1989 - 1994) Front Anti Roll Bar Bush 23mm - PFF57-601-23 - For the 993, it is only used on the RS Models. - Bush Size: 23mm - 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!