MSD 8737 Three Step Module Selector

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The Module Selectors can also be used with an MSD Timing Control. By plugging the Selector into a retard module socket, you can acti?¡vate different retard amounts at select times. This is a great feature for engines being upgraded to a multi-stage nitrous system. With the addition of an RPM Activated Switch, you can use the Two Step to activate a shift light at different rpm.The Module Selectors must be used with an MSD Soft Touch Rev Control or a Timing Controller with a high-speed retard module. No rpm or retard modules are supplied. Features: Set 3 RPM limits: Burnout rev limiter Launch?árev limiter Top End?árev Limiter Show more