The GMR (Giant Magneto Resistive) Pickup clips onto a current-carrying wire with no splicing or cutting required and converts that signal into a clean 12-volt RPM output. It can be used to trigger a shift light, an RPM-activated switch, or a tachometer — including on diesel injector wires or coil-on-plug primary leads.
Specifications:
- Brand: MSD
- Category: Body
- Product Type: Tach Pickup
- Sub Category: Instrument Panel
- Warning: California Proposition 65
- Warranty: Manufacturer's Limited 1 Year Warranty
- Part Number: 8918
Operates with a 5-24 volt input for universal applications.
FAQ
What does GMR stand for on the MSD 8918?
Giant Magneto Resistive.
Does installing the 8918 require splicing wires?
No, it clips onto a current-carrying wire with no splicing or cutting.
What can the 8918 signal trigger?
A shift light, an RPM-activated switch, or a tachometer.

