Pertronix D175520 Flame-Thrower OEM Replacement Vacuum Advance Cast Electronic Distributor for Rover 8 Cylinder All new lightweight cast aluminum housings Integrated Ignitor electronic ignition delivers twice the voltage to the spark plugs, increasing horsepower, fuel economy, and spark plug life Rotating cobalt magnets trigger a Hall Effect integrated circuit which enables precise timing High dielectric strength cap Balanced rotor with overmolded brass contact