The SN20 is a low pass filter. This filter allows signals of valid tachometer frequencies to pass through to the gauge while blocking high frequency interference. This filter would be helpful if you have interference on the tachometer's signal which is causing erratic behavior on your tachometer.

Features:

More From This Category

MSD Cam Position Sensor, Cam Sync, Pro-Billet Plug, Steel Gear, For Ford, 289, 302, Each

MSD Cam Position Sensor, Cam Sync, Pro-Billet Plug, Steel Gear, For Ford, 289, 302, Each

$653.79