TDC Crank Sensor, Zero Crossing Sensor, 3-Pin, 3/8-24 Threaad

This speed sensor is used to pick up Top Dead Center (TDC) on the front hub of the engine. Zero crossing rpm sensor, 3-pin 3/8 in. diameter. This sensor is designed specifically for use with MSD-style crank trigger wheel and magnets. It must be used with a rpm input designed for a zero crossing sensor.