Are you looking for an RPM Switch that will turn a circuit on, then off at a different rpm?. How about one for your late model coil-per-cylinder ignition system?. Maybe one for a Viper or even a Harley Davidson?.
MSD 8969 Digital RPM Window Switch
MSD Ignition 8745 RPM Module Kit for 5000-5800 RPM, 200 RPM Increments
MSD Ignition 8747 RPM Module Kit for 7000-7800 RPM Range, 200 RPM Increments
MSD 8732 Digital 2-Step Rev Control, for Digital 6AL PN 6425 Only
MSD 87481 Ignition RPM Modules 8100 to 8900 rpm Set of 5
MSD Ignition Ignition RPM Modules 5000 to 5800 rpm Set of 5 8745