MSD 6EFI Ignition Box # MSD6415Ignition Boxes, 6EFI Ignitions, Capacitive Discharge, Digital, Rev Limiter, 10 18 V, Black, Each Ignition Box Output: Capacitive discharge Circuitry: Digital Rev Limiter: Yes Timing Retard: None Data Acquisition: No CD Voltage Output to Coil: 435 V Current Draw: 0. 7 amps per 1,000 rpm Spark Output (millijoules): 95 mJ Minimum Operating Voltage: 10 V Maximum Operating Voltage: 18 V Length (in.): 6. 000 in. Height (in.): 1. 750 in. Width (in.): 3. 500