Spark plug NGK BR7HS for Citroen 2CV6 up to the year of construction 1979 The BR7HS is a suppressed spark plug

high ohmic resistance). Basic information on interference suppression: Up to the year of construction 1979, the ignition cables had a low resistance. As did the spark plug. Suppression chokes were installed for electrical interference suppression. This can be avoided today by combining high-resistance spark plugs with low-resistance ignition cables.