The RPM-Activated Switch turns functions like a bulb, solenoid, or MSD Timing Control on or off at a set engine RPM. It has two activation wires — one to ground a circuit and one to open it — and works with stock inductive ignitions or an MSD ignition, handling up to 1.5 amps. It's plug-and-play with MSD's RPM modules, which are sold separately.
Specifications:
- Brand: MSD
- Category: Air and Fuel Delivery
- Product Type: RPM Switch
- Sub Category: Fuel Injection System and Related Components
- Warning: California Proposition 65
- Warranty: Manufacturer's Limited 1 Year Warranty
- Part Number: 8950
FAQ
What does the MSD 8950 RPM-Activated Switch do?
It grounds or opens a circuit once the engine reaches a programmed RPM, activating accessories like a solenoid, bulb, or MSD Timing Control.
How much current can the 8950 handle?
Up to 1.5 amps.
Do RPM modules come with the 8950?
No, RPM modules must be ordered separately.

