When you reach set engine RPM, You can ON or OFF almost any switchable item whatever you want example Red is IGNITION wire (+12V). car windows and other.
Msd Ignition 8950, One Black Plastic Rpm Activated Switch Kit Performance Parts
MSD 8950 RPM Activated Switch Kit (NOS) @ Speed Tech
MSD 8956 Window RPM Activated Switch NHRA Drag Race
MSD Ignition 8956 RPM Activated Window Switch
Msd Ignition 8956, One Black Plastic Rpm Activated Window Switch Performance Par
