MSD Ignition, based in El Paso, Texas, is an american automotive aftermarket manufacturing company that specializes in high-end ignition system and electrical components. In 1970, MSD was the first company to experiment with Multiple Spark Discharge for the ignition system of internal combustion engines. The line of MSD 6-Series Ignitions are the most popular aftermarket ignitions in the world due to their race-proven performance on the track and their reliability on the street !