MSD Ignition Digital-6A Digital Ignition Controller Features: Digitally Controlled Circuitry Increased Output 530 Primary Volts And 135mJ Of Spark Energy Sealed/Locking Connector Contains All Wiring Built-In LED For System Confirmation Set RPM Limit Via Rotary dials Same Bolt Pattern As Original 6AL Height: 3.00 Width: 8.00 Length: 11.00 Weight: 3.80 lbs