The Dedenbear RPM2 RPM Activated switch allows you to trigger a wide variety of electrical devices on your race vehicle based on a pre-selected, user-defined RPM point with incredible repeatability. The ability to trigger on a single cylinder or multi-cylinder engine allows for a multitude of control options including: Shifting, Nitrous ignition and more. Push button controls eliminate the need for separate pills or modules and built in design features such as manual override, time delay, and disable circuit make this module ideally suited for control of an air or electric solenoid control shifter. Suitable for use with 8 cylinder applications