Seller notes

Tachometer signal Filter. HEI OEM 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...

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