Quick view Lucas 20D8 Rotor Arm DRB112C R20 - Powermax R20 Rotor Arm for Rolls Royce, Daimler Dart & V8 DRB112C The Powermax R20 moulded rotor arm suitable for the Lucas 20D8 distributor has a modern design for improved performance and durability. It is fitted with an internal steel spring... £18.95 Add to Cart Compare