Powerflex Polyurethane Bush kit for Caterham 7 (DeDion With Watts Linkage) DeDion "A" Frame Centre Bush - PF8-907 - Vehicles up to 1996 use PF8-903, Vehicles after 1996 use PF9-907. This bush is suitable for Road and Black Series applications. - 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!