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MSD 6425 6AL Digital Ignition Control Box

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What's in the Box

The MSD Digital 6AL features a higher output with 530 primary volts and 135mJ of spark energy. Efficient components use less current to produce more power. Set an rpm limit on the MSD 6AL rev limiter with two rotary dials. Has the same bolt pattern as the original 6AL, but with a lower profile housing. Built-in LED for system checks. All wires exit the same side through a locked, sealed connector. Compatible with 4, 6 and 8-cylinder engines.

547-6425 Instructions (PDF) 

MSD Tech Bulletin

Learn more about the benefits and features of the MSD 6AL Digital Ignition Control Box by reading StangTV's tech article.  MSD's Newest 6AL Takes Conventional Ignitions into the Digital Age.

Learn more about determining the proper MSD ignition control box for your application by reading our tech article. The Differences Between 6 Series MSD Ignition Control Units.

Specs

  • Spark Energy:  135-145 mJ per spark 
  • Primary Voltage:  520-540 Volts 
  • Secondary Voltage:  45,000 Volts 
  • Spark Series Duration:  20 degree Crankshaft Rotation 
  • RPM Range:  15,000 RPM with 14.4 Volts 
  • Voltage Required:  12-15 Volts, 7 Volt Start 
  • Current Draw:  .7 Amp per 1,000 RPM 
  • Weight and Size:  1.7 lbs., 8"L x 4"W x 1.825"H 

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MSD 6AL Ignition Control with Rev Limiter
                        

The 6AL shares the same proven circuitry of the 6A with the addition of a built-in adjustable rev limiter. The combination of powerful sparks with the safety of a Soft Touch Rev Control is what makes the 6AL the most popular ignition control in the world.

  • Delivers full power multiple sparks using capacitive discharge circuitry
  • Trigger from distributors with breaker points, amplifiers or magnetic pickups
  • Prevents overrev damage to your motor in the event of a missed shift or driveline failure
  • RPM limit is adjustable in 100 rpm increments
  • Upgradeable with MSD timing accessories
  • Supplied with rubber shock mounts and modules for 3,000, 6,000, 7,000 and 8,000 RPM

547-6420 Instructions (PDF)

MSD 6AL Digital Age Article (LINK)

MSD 6462 6BTM CDI Ignition Control Unit
                        

The 6 BTM cd ignition is ideal for engines with a turbo or supercharger. Not only will the engine benefit from MSD's full power CD sparks, but there is also an adjustable boost/timing retard circuit to prevent detonation.When your turbo or blower forces the air/fuel mixture into the engine, the cylinder pressure inside the combustion chamber increases. The result is a great increase in power but this can also lead to detonation that can result in severe engine damage. The 6 BTM CDI lets you dial away detonation by retarding the timing in relation to the boost pressure.A dash mounted control knob lets you adjust the amount of timing retard. It can be adjusted from 0 degrees per pound of boost to 3 degrees per pound (up to 15 degrees).The 6 BTM also shares the Soft Touch Rev Control of the 6AL Ignition for overrev protection. The BTM is supplied with rubber shock mounts and rpm modules for 3,000, 6,000, 7,000 and 8,000 rpm.

  • Multiple spark, capacitive discharge ignition control
  • Retard the ignition timing 1 degrees-3 degrees per pound of boost, maximum of 15 degrees, with dash mounted adjustable control knob
  • Multiple sparks for 20° of crankshaft rotation
  • Works on 12 - 18 volt electrical system
  • Accepts breaker points, amplifier and magnetic pickup trigger inputs
  • 470 primary voltage output to coil
  • 110 millijoules per spark up to 15,000 RPM
  • Built-in Soft Touch Rev Control is adjustable with RPM Modules
  • Programmable for 4, 6, or 8-cylinders by cutting red/blue wire loops
  • Supplied with rubber shock mounts
  • Supplied with 3,000, 6,000, 7,000 & 8,000 RPM Module
  • CARB E.O. Approved

547-6462 Instructions (PDF)

547-6462 Instructions Part 2 (PDF)

Learn more about determining the proper MSD ignition control box for your application by reading our tech article. The Differences Between 6 Series MSD Ignition Control Units. 

 

MSD 6421 6AL-2 CDI Ignition Box
                        

The all new 6AL-2 capacitive discharge ignition will easily connect to nearly any 12-volt negative ground distributor system. Inside the new cast aluminum housing you'll find an advanced micro-controller that manages the timing and rpm of the ignition.

  • Upgraded digital spark output versus standard 6AL series
  • Multiple sparks over 20° of crankshaft rotation ensures complete combustion
  • Blast off the starting line with the 2-step rev limiter 
  • High end overrev protection plus clutch or transbrake launch limiters
  • Adjustments made via four rotary dials in 100 RPM increments
  • Accepts Hall-effect, points and mag pickup triggers

547-6421 Instructions (PDF)

Learn more about determining the proper MSD ignition control box for your application by reading our tech article. The Differences Between 6 Series MSD Ignition Control Units.


 

MSD 6201 6A Ignition Control
                        

Higher output with 530 primary volts and 135mJ of spark energy. Efficient components use less current to produce more power. Same bolt pattern as the original 6A with a lower profile housing. Built-in LED for system checks. All wires exit the same side through a locked, sealed connector. Compatible with 4, 6 and 8-cylinder engines.

547-6201 Instructions (PDF) 

Learn more about determining the proper MSD ignition control box for your application by reading our tech article. The Differences Between 6 Series MSD Ignition Control Units. 

Outerwears Scrub Bag Cover for MSD Rectangle Ignition Boxes
                        These quality scrub bags will cover your MSD rectangle style ignition box to  protect from dirt and debris during the race or at the carwash. Designed  for transporting and washing. Manufactured from water repellent  Denier  nylon. 
  • For MSD ignition boxes
  • 4" wide x 8" long x 2-3/8" tall
  • Draw string wraps up the bag tightly
  • Made of durable denier nylon material
  • Protects from dirt and debris
  • Designed for transporting and washing
  • Choose from colors: Black, Blue, Light Green, Orange, Purple, Red, and Yellow