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Digital 6AL Ignition Control

The ignition that set the standard by which all others are judged. Includes a built-in rev limiter.

PART# 6425

Suggested Retail: $277.95
Your Price:$249.95
Free Shipping on orders over $100*
CARB EO: D-40-43


The MSD 6AL Ignition Control set the standards that other ignitions strive to reach. In fact, you’ll find ignitions from other companies that carry the 6AL name (and in some cases, the same part number). MSD raised the bar even higher with the revised Digital 6AL Ignition Control! The wiring of the Digital 6AL is routed out one end of the unit through a sealed and locking connector. This eases installation and keeps your wiring looking neat and clean. The rev limiter of the 6AL is located right on top of the housing for easy access to the two rotary dials to set the limit in 100 rpm increments. Inside the Digital 6AL you’ll find a microprocessor that monitors and controls every firing and rev limit. The circuits are updated with efficient components that help the ignition produce more power while drawing less current! In fact, the Digital 6AL delivers over 530 volts to the coil with up to 135mJ of spark energy for every firing! Increased output combined with MSD’s proven multiple spark series is a win-win situation! The Digital 6AL is supplied with the wiring harness and the components you’ll need for installation. The 6AL is also supplied with vibration mounts. Both ignitions are compatible on 4, 6 or 8-cylinder engines with 12-volt, negative ground electrical systems. They’ll accept trigger inputs from breaker points, amplifiers and magnetic pickups.


  • High output with 530 volts and 135mJ of spark energy
  • Efficient components use less current to produce more power
  • Set an rpm limit with two rotary dials in 100 rpm increments
  • Built-in LED for system checks
  • All wires exit through a locked, sealed connector
  • Compatible with 4, 6 or 8-cylinder engines


Current Draw.7 Amp per 1,000 RPM
Emission Code1
FeaturesRev Limiter
Primary Voltage520-540 Volts
Product Type6AL Ignition
RPM Range15,000 RPM with 14.4 Volts
Secondary Voltage45,000 Volts
Spark Energy135-145 mJ per spark
Spark Series Duration20 degree Crankshaft Rotation
Voltage Required12-15 Volts, 7 Volt Start
WarningCalifornia Proposition 65
Weight and Size1.7 lbs., 8"L x 4"W x 1.825"H

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This part is legal for use on Emissions Controlled Vehicles when used in accordance with the manufacturers application guide because it has a California Air Resources Board Executive Order number or is a direct or consolidated replacement part.

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
WARNING FOR 6425: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
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