Auto Meter 9118 Tachometer Magneto Signal Converter Allows any Auto Meter standard ignition tachometer or DPSS Controller Module to be used in most external coil Magneto applications. Allows any Auto Meter standard ignition tachometer, Pro-Shift Lite or RPM activated module to be used in most magneto applications It is sold individually These adapters offer an easy way to install pressure and temperature gauges Allow you to use any Auto Meter standard ignition tachometer, shift light, or rpm-activated module on most Supermag and Vertex magneto applications