When you really want control over your engine's timing, the Six Shooter is the answer! Six different retard stages can be activated at select times for total control over the magneto's timing all the way down the track. There are six retard stages available for each Pro Mag (dual systems) and each stage has its own activation wire. The Shooter must be used with the Pro Mag Timing Control,P/N 121-8168, and is designed to be mounted right below it so installation is simple. Each retard of the Shooter is seperated and is activated when 12 volts are supplied to its corresponding activation wire. Only one in stock.