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 8950 RPM Activated Switch Kit (NOS) @ Speed Tech
MSD 8956 Window RPM Activated Switch NHRA Drag Race
18961 Nitrous Express Digital RPM Activated Window Switch Adjustable Screen
RPM ACTIVATED WINDOW SWITCH Intellitronix Lifetime Warranty! Memory Tach Nitrous
RPM ACTIVATED 3 MODE WINDOW SWITCH Memory Tach Intellitronix N3211 Made In USA!
RPM ACTIVATED WINDOW SWITCH 3 Mode Intellitronix Made In USA Lifetime Warranty!
