This compact Digital Shift Light programs its single RPM activation point through an easy-to-view LED panel and two buttons, no separate RPM modules required. Six bright red LEDs illuminate to signal the shift point, and it installs on everything from 1-cylinder points-triggered engines to 12-cylinder coil-on-plug systems. It ships with a GMR Pickup (PN 8918) for easy hookup on diesels, points, or coil-on-plug applications.
Specifications:
- Brand: MSD
- Category: Body
- Product Type: Shift Lights
- Sub Category: Instrument Panel
- Warning: California Proposition 65
- Warranty: Manufacturer's Limited 1 Year Warranty
- Part Number: 89631
Programmable from 100-15,900 RPM in 10 RPM increments.
FAQ
How does the MSD 89631 differ from the MSD 8963?
The 89631 is a single RPM-point on/off shift light, while the 8963 offers the same LED display with similar programmable functionality.
What's included with the 89631?
A GMR Pickup (PN 8918) for easy installation on diesels, points, coil-on-plug, or nearly any other application.
What's the programmable RPM range of the 89631?
100 to 15,900 RPM, adjustable in 10 RPM increments.

