MSD Digital-6 Plus Ignition Controller 6520
MSD Digital-6 Plus Ignition Controller 6520
MSD Digital-6 Plus Ignition Controller 6520

MSD Digital-6 Plus Ignition Controller 6520

(Exc. 8% Sales Tax - GA only)
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Part Number
MSD Ignition

MSD Digital-6 Plus ignition controller. This system combines terrific power, digital accuracy, and great accessories making it ideal for street/strip applications, with every spark from the Digital-6 Plus Ignition unit, packed with 135 millijoules of spark energy and 535 primary volts.

For nitrous-equipped cars, the Digital-6 Plus offers a step retard that will retard the timing when the nitrous is activated. There is also a 2-step rev limiter for holeshot consistency and over-rev protection. The Digital-6 Plus accepts points, amplifier and mag pickup inputs and will run on 4, 6, or 8 cylinder engines.

The MSD Digital-6 Plus uses a high-speed RISC microcontroller to control the ignition's output while constantly analyzing the various inputs such as supply voltage, trigger signals, and rpm. The high-speed controller can make extremely quick compensations to the output voltage, multiple spark series, timing, and rpm limits while maintaining accurate timing signals to within 1 and 1% of the rpm limits. The circuits and controller of the Digital 6 Plus have been thoroughly debounced and isolated to create protection against Electro-Magnetic Interference (EMI).


  • Switch between two rev limits that adjust with rotary switches in 100 rpm increments
  • Single stage retard for nitrous and top end performance
  • Start retard eases pressure on the starter, flywheel and engine
  • Adjustable magnetic pickup compensation produces accurate trigger signals
  • LED display warns of trigger signal problems or faulty charging system

  • Specs
    Current Draw0.7 Amp per 1,000 RPM
    Emission Code1
    Primary Voltage535 Volts
    Product TypeDigital-6 Plus Ignition Control Box
    RPM Range12,500 RPM with 14.4 Volts
    Secondary Voltage45,000 Volts
    Spark Series Duration20° Crankshaft Rotation
    Voltage Required12-18 Volts, Negative Ground
    WarrantyLimited 1 Year Warranty (PDF)
    Weight and Size3.7 lbs, 8.5" L x 4.5" W x 2.2" H
    Part Number6520


    This part is legal for sale and use on Emissions Controlled Vehicles, in all 50 states, when used in accordance with the manufacturers application guide because it has a California Air Resources Board (CARB) Executive Order (EO) number.

    The following vehicles are considered Emissions Controlled Vehicles:

  • 1966 and newer U.S. manufactured California Certified vehicles
  • 1968 and newer U.S. manufactured Federally Certified vehicles
  • 1968 and newer Foreign manufactured vehicles

  • P65 Warning
     "WARNING: This product contains a chemical known to the State of California to cause cancer and/or birth defects or other reproductive harm.