MSD 6520 Ignition Control Module

Part Number
Digital-6 Plus Ignition Controller; For 4/6 Even Fire/8 cyl. Engines
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The MSD digital-6 plus ignition control combines terrific power, digital accuracy and great accessories making it ideal for street and strip applications. Every spark of the digital-6 plus ignition is packed with 135 millijoules of spark energy and 535 primary volts. When used with the MSD blaster HVC Coil (PN 8252) a spark with over 300 milliamps burns across the plug gap for 400 microseconds. Below 3,300 rpm the digital-6 plus produces a series of sparks that burns in the cylinder for up to 20 degrees of crankshaft rotation. This incredible heat ensures combustion to produce great power, quick throttle response, smooth idle and quick starts.



  • Digital-6 Plus Ignition Controller
  • LED warns of trigger signal problems or faulty charging system.
  • Single stage retard for nitrous and top end performance.
  • Holley Performance Emission Code 1: 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 vehicle
  • Start retard eases pressure on the starter; flywheel and engine.
  • Switch between 2 rev limits
  • Digital-6 Plus Ignition Controller; For 4/6 Even Fire/8 cyl. Engines;
  • Adj. magnetic pickup compensation for accurate trigger signals.
  • Digital 6-Plus Ign.Control;Microprocesso


Current Draw.7 Amp per 1000 RPM
Primary Voltage535
Secondary Voltage45000
Spark Duration20 Degree Crankshaft Rotation
Voltage12-18 V; Negative Ground
WARNING CA Proposition 65Yes
WARNING CA Proposition 65 MessageWARNING: Cancer and Reproductive Harm -


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