Rotor Arms · Basis NZ
Rotor arms for 1920s–1980s classic cars
The rotor arm spins inside the distributor cap and passes the spark from the coil to each terminal in turn. It is a small part under a lot of stress: the tip burns and corrodes, the plastic can crack and carbon-track, and either one can mean misfires, a weak spark or a car that will not start. Basis stocks rotor arms for classic cars from the 1920s to the 1980s.
Rotor arms are specific to the distributor and how it is driven, so match it to your distributor rather than assuming one fits every year of a model. Always replace the rotor arm when you replace the cap — a worn arm quickly marks a new cap.
