High Energy Ignition System (HEI) Tachometer signal Filter and aftermarket compatible.
Many General Motors vehicles within the range of 1975-1990 come equipped with this ignition system style and a tachometer type that has a circuit board driving the tachometer.
If your vehicle falls between these years, verify this is the type of ignition system and tachometer in your vehicle.
- Provides a stable reliable signal to the Tachometer for better Tachometer response and performance.
- This filter removes ignition spikes, voltage surges, electrical noise, causes by High Energy Ignition systems, and some after market ignition modules.
- Compatible as an OEM replacement Tachometer filter for GM vehicles.
- Compatible with aftermarket ignitions systems such as MSD, Holley, Speedmaster.
- Compatible with Tachometers that are circuit board driven and some aftermarket tachometers.
- Not compatible with Tachometers that are simply a coil. Usually that would be 1975 and newer GM vehicles.
- Three color-coded wires allow fast and easy installation.
- Includes installation hardware, installation instructions, and trouble shooting tips.
Provides protection and superior response on all Classic Tachometers.
Tachometer signal filters are not a fix-all for tachometer problems. Proper diagnosis should be performed to determine if the signal filter is the problem before replacing it.
Customer feedback: This fixed a problem I've been having for over a year with aftermarket gauges. Thanks!!!!