MSD 7330 Black 7AL-3 Pro Drag Race Ignition Control SPARK ENERGY:160 Millijoules/Spark PRIMARY VOLTAGE:570 Volts SECONDARY VOLTAGE:50,000 Volts SPARK SERIES DURATION:20 Crankshaft Rotation RPM RANGE:14,000 RP M with 14.4 Volts VOLTAGE REQUIRED:12-18 Volts, Negative Ground CURRENT DRAW:6 Amps at 6,000 RPM 12 Amps at 12,000 RPM WEIGHT & SIZE:4.75 lbs., 8L x 3.75W x 5.75H Tested with Pro Power Coil, PNPN 8201