MSD 8737 Multi-Step Module Selector
Popular Two Step Module Selector with a third rpm receptacle! This third rpm function is designed for drag racing applications and is activated when vehicle is doing its burn out so that tire temperatures are kept consistent.
SPECIFICATIONS
Gives Ability To Choose 3 Different Rpm Limits
Must Be Used with An Msd Soft Touch Rev Control Or A Timing Controller with A High Speed Retard Module