MSD RPM Activated Switch - 4 Cylinder 97200BK It also contains Dyno proven

It also contains Dyno proven horsepower saving windage tray and uses the same pick-ups as the CP100 series pans

Includes Data Acquisition Solid-State Pressure Transducer

Wheel Studs-5/8"-18 x 4-13/32" Screw-in

Breather Grommet

MSD RPM Activated Switch - 4 Cylinder 97200BK It also contains Dyno provenThese RPM Activated Switches will perform a variety of different functions from turning on a bulb or solenoid to activating an MSD Timing Control at a desired rpm. The RPM Activated Switch, PN 8950, has two activation wires; one to ground a circuit and the other to open a circuit. Simply plug in an rpm module and wire the Switch to the circuit you want to activate. When the engine rpm reaches that amount, the circuit is activated and will remain on