'E-Spark' ignition module. Dual fire

Dual fire ignition module for mechanical advance. This module is optically triggered by an infrared light and a photocoupler. Therefore this system will provide a 100% stable ignition timing, at any RPM. The Mallory's E-Spark can be used to drive any ignition coil (Accel coils recommended), or combination of coils with a total primary resistance of at least 2.0 Ohm. Coil recommendation: 2.0-3.0 Ohm for race applications and 3.0-4.0 for street/highway use.