MSD Digital 6Al Ignition Box by MSD

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MSD Digital 6Al Ignition Box 6425
  • MSD Digital 6Al Ignition Box 6425
  • MSD Digital 6Al Ignition Box 6425

Upgrade your ignition to Digital technology with the best name in the business: MSD. Perfect for street/strip use in your Mustang!

Item #MSD-6425
MPN# 6425

Your Price: $262.95

Market Price:$317.95
You Save 17.30 % ($55.00)

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  • Increased Spark
  • Built IN Rev Limiter


  • Higher Output
  • 530 Primary Volts & 135mJ Of Spark Energy
  • Lower Profile Housing
  • 6AL Rotary Dials
  • Soft Touch Rev Control
  • Built-in LED For System Checks
  • Wires Exit The Same Side
  • Sealed Connectors
  • Works With 4, 6 & 8 Cyl. Engines

What's in the Box

  • (1) Digital MSD 6AL Controller
  • (1) Mounting Hardware Packet
  • (1) Setting Adjustment Tool
  • Installation Instructions

Product Description

Advance with the digital power of your popular favorite--MSD 6AL ignitions. With less power draw and higher output, MSD moves you with "the fire to drive" in a digital powerhouse! Inside microprocessors, updated circuits and efficient components monitor and handle every firing and rev limit to produce more power while pulling less current. Don't worry; features that made the original 6AL boxes your first choice remain but with improved output!!! More than135mJ of spark energy for every firing with 530+ volts to the coil! And, to go with the new power, a new look. These digital 6AL ignition controllers are sleek with a lower profile. Wiring is routed out one end through a sealed and locked connector and two rotary dials to set rpm limit are positioned right on top. Easier installation, super easy access and a clean, neat appearance under the hood. Controllers are supplied with wiring harness and components you need for install plus, vibration mounts. Increased output and proven multiple-spark power--MSD digital 6AL ignition controllers are a definite win-win!

MSD Performance Limited Warranty - Click Here

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Customer Photos (2)

Product Reviews (4)

out of 5 stars
5 stars
4 reviews
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4 of 4 REVIEWS
4 of 4 REVIEWS

5 Stars   Worth every penny.
By on 12/31/2014
Image uploaded by Joe D. The idle is rock solid now. It does not move at all. It does seem a little livelier and take offs are...easier? It seems like it takes off faster which I don't know if that's in my head or what? HP gain.......probably not. It does seem smoother. The air fuel meter still moves at idle, but slower (more stable). It does not bob between 14.5-15.2 nearly as fast as it use to. I say it's doing a good job and a nice upgrade. Besides the idle, it's not a night and day difference, but one you can notice. I have the rev limiter set to 5,900 so I will never red line my car which is nice to know. There is also an option to make a toggle switch to make an anti-theft device which is VERY EASY to do. The instructions tell you how to do it. It's nice to know that when I feel uncomfortable leaving it somewhere I can flip my toggle switch and the car wont start. That alone makes it worth the purchase. I would also advise to purchase the optional harness to make the install easier and cleaner, but it's not necessary. I put mine right next to the washer fluid tank under the fender and directly underneath the battery until I do a battery relocation kit. If you are planning to put it inside the car, be prepared to purchase 12 gauge and 16 gauge wire, because you will have to make every single wire longer unfortunately. I didn't really have to room in the firewall opening to put more wires though at the moment (a lot of electronics in my car).

Yes, I would recommend this item to a friend!

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5 Stars   Worth every penny.
By on 4/9/2016
MSD appears to have brought the 6AL into the 21st century. Same footprint as the old box but half the size and weight. No more rev limiter pills, a quick disconnect harness, and much smoother RPM limiter. The thing I'm most pleased with is the driveability improvement. The car doesn't 'cam surge' at low speed anymore. Even if your old 6AL hasn't stranded you in traffic, you would be well served to swap out to a digital 6.

Yes, I would recommend this item to a friend!

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5 Stars   Awesome product
By on 11/2/2015
Again msd is awesome. No hesitation.

Yes, I would recommend this item to a friend!

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5 Stars   Great product
By on 4/15/2016
Had this one on my car but was installed by someone else before I bought the car. Worked great but was installed where it got wet. So bought a new one works beautiful and installed it where it would not get wet. Ty Lmr.

Yes, I would recommend this item to a friend!

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About This Brand

MSD Ignition products are the finest ignition components you can install on your Mustang or SVT Lightning. Whether it's a daily driver, Road Racer, a seven second Pro Stock car or Big Foot. MSD is your exclusive performance ignition company and we thank you for your interest and support. Latemodel Restoration has you covered with MSD ignition kits, ignition boxes, distributors, coils, and other high performance ignition components.

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