MSD RPM Activated Switch - Window 472 cover fits neatly over spoiler

cover fits neatly over spoiler and protects car from debris

10 AN Male to Quick Release Socket

Mechanical Advance Curve Kit

Silverado 3500 HD 2017-2011

MSD RPM Activated Switch - Window 472 cover fits neatly over spoilerThese 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