MSD Tach Adapter

Restore proper tachometer operation after installing an MSD ignition control with this MSD tach adapter. Some factory tachometers cannot accurately read the trigger signal produced by an MSD box, resulting in erratic or non-functioning tach readings.

This tach adapter boosts and conditions the signal so the tachometer works correctly with modern MSD ignition components. It is required when using a magnetic pickup input with green and violet trigger wires and is compatible with most voltage-triggered tachometers. It can also support current-triggered tachs when wired in series. Designed for vehicles equipped with MSD ignition systems, this adapter helps deliver stable and accurate tachometer readings.

Features and Benefits:
- Corrects tachometer signal issues with MSD ignition control
- Compatible with most voltage-triggered tachometers
- Required for magnetic pickup input green and violet wires
- Supports current-triggered tachometers
- Provides stable and accurate tachometer operation
- Simple wiring design

Vehicle Fitment:
- Vehicles with MSD ignition systems requiring tach signal conditioning
- Common on Chevy/GM V8 applications running MSD 6‑series boxes

Additional Notes:
- Use MSD Tach Adapter P/N 8920 when triggering the ignition with magnetic pickup wires.
- Adapter corrects tach operation when the tach cannot run directly off the MSD tach output.