Pertronix D189504 Flame-Thrower VW Type 1 Engine Plug and Play 6 Volt Negative Ground Vacuum Advance Cast Electronic Distributor with Ignitor Technology All new lightweight cast aluminum housings Tailored advance curve for optimal performance and driveability 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 with brass terminals