PerTronix 1146A Ignitor for Delco 4 Cylinder Delivers twice the voltage to the spark plugs, increasing horsepower, fuel economy, and spark plug life.IGNITOR DELCO 4 CYL (CW) 2:1 improvement over points in current fall time for increased coil output.Can be used with most point-type coils, optimal performance achieved when used with our Flame-Thrower 40,000 volt coil. Rotating cobalt magnets trigger a Hall Effect integrated circuit no points to burn, no moving parts to wear out Epoxy molding makes our module impervious to dirt, oil, grease and moisture Stable timing no need for any adjustments