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Intake/Exhaust Valve Size
552" and allow for the use of lightweight rockers
Idle / 3500 RPM
1974-1987 Chevrolet Camaro
MSD RPM Three Step Module Selector 57105BK Intake/Exhaust Valve SizeThe 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
US$ 130.00
US$ 125.65
