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Fits Two 3-3/8 in
Collar includes grease fitting
Available to fit popular racing OEM lower a-frames
Its Coefficient Of Thermal Expansion Is Identical To Cast Iron Engine Blocks
MSD RPM Two Step Module Selector Springs & Components Fits Two 3-3/8 inThe 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, well 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 are applied to a corresponding wire. By connecting one wire to the line lock circuit, one module will be
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