MSD rpm module selectors plug into the rpm module socket on MSD Soft Touch rev controls, ignition boxes with output for rpm, and any other accessories that use plug-in modules.

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MSD RPM Module Selector, Plastic, Black, 7, 600-9, 800 rpm, 200 rpm Increments, Each

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MSD RPM Module Holder, Module Organizer, Holds Up To 40 Modules, Rubber

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