MSD : 8739 : Module Selector - Two Step

The MSD Module Selectors allow you to choose two or three different rpm limits that can be activated at different times. With this ability, the possibilities are endless. As an example, we'll use a drag car with a Three Step Module Selector plugged into the rpm socket of a 7AL-2 Ignition. The different rpm modules are activated when 12 volts is applied to a corresponding wire. By connecting one wire to the line-lock circuit, one module will be activated during the burnout.
  • Two Step Module Selector


  • 8739$68.99
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