MSD Digital RPM Activated Switch - Window Switch w/ Tach Air Intake 1966 GMC 1500

1966 GMC 1500

TBI Throttle Body Flange

After a rigorous design and testing phase

Expansion Plug

MSD Digital RPM Activated Switch - Window Switch w/ Tach Air Intake 1966 GMC 1500This Switch will accept an input rpm signal from a coil negative terminal (for stock ignitions), a tach output from an ignition control, an ECU tach output or even a 5 volt tach signal. Another great feature is that no rpm modules are needed! The rpm activation points are programmed by simply scrolling through the LED display to your desired rpm amounts. The switch has two outputs; one Normally Open, the other is Normally Closed. It can be programmed