Powerflex Polyurethane Bush kit for Caterham 7 (DeDion With Watts Linkage) Rear Axle Trailing Arm Front Bush - PF8-909-10 - - Bush Size: - 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!