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  • MSD Ignition 6425 6AL Ignition Control Box

MSD Ignition 6425 6AL Ignition Control Box

4.5 out of 5 stars (541)
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Purchase options and add-ons

  • With soft touch rev control
  • 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 6AL with two rotary dials
  • Same bolt pattern as the original 6AL with a lower profile housing

Frequently bought together

This item: MSD Ignition 6425 6AL Ignition Control Box
$460.85
Get it Mar 26 - 30
Usually ships within 3 to 4 days
Ships from and sold by RC-Automotive - Canada.
+
MSD Ignition 8202 Blaster 2 Hi-Performance Coil
$76.44
Get it by Saturday, Mar 21
In Stock
Ships from and sold by 鶹.ca.
Total price:$00
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Product details

  • Is discontinued by manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 24 x 6 x 24 cm; 1.4 kg
  • Manufacturer ‏ : ‎ MSD Ignition
  • ASIN ‏ : ‎ B004EGZU42
  • Item model number ‏ : ‎ 6425
  • Department ‏ : ‎ unisex-adult
  • Customer Reviews:
    4.5 out of 5 stars (541)

Product description

Built-In Adjustable Rev-Limit Control. 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. The Digital 6AL delivers over 530 volts to the coil with up to 135mJ of spark energy for every firing. This 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. 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.. CARB EO: D-40-43

Product information

Technical Details

Manufacturer ‎MSD Ignition
Place of Business ‎El Paso, TX 79936, USA
Brand ‎MSD
Model ‎MSD Ignition 6425 6AL Ignition Control Box , Red
Product Dimensions ‎24 x 6 x 24 cm; 1.4 kg
Item model number ‎6425
Is discontinued by manufacturer ‎No
Exterior ‎Machined
Manufacturer part number ‎6425
OEM part number ‎6425
Item Weight ‎1.4 kg

Additional Information

ASIN B004EGZU42
Customer Reviews
4.5 out of 5 stars (541)

4.5 out of 5 stars
鶹 Rank
Date First Available Aug. 14 2012

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MSD Ignition 6425 6AL Ignition Control Box

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Customer reviews

4.5 out of 5 stars
541 global ratings

Customers say

Customers find this auto part works very well and performs well overall. They describe it as a great part and very good product. The installation process is fairly straightforward with simple wiring. Users report increased throttle response throughout the entire rpm range. The part improves starting performance, making cars start easier. Customers also appreciate the ignition and performance aspects, though they have mixed opinions on effectiveness.
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45 customers mention functionality, 38 positive, 7 negative
Customers report that the auto part works very well and performs fantastically. The rev limiter functions properly and helps maintain engine RPM levels. Users note that their engine runs much better when the part is connected.
works greatRead more
Works well msd best productRead more
number 1 works perfectRead more
...going strong - replaced my old MSD ignition with the new - and it works awesome.Read more
34 customers mention quality, 32 positive, 2 negative
Customers find this auto part to be a great product with best quality. They describe it as a great piece of kit that is better and perfect for their needs.
...Great piece of kit..Read more
Another great MSD product...Read more
...Very dissapointing.Read more
14 customers mention installation, 13 positive, 1 negative
Customers find the auto part's installation process straightforward with simple wiring. The ignition management system operates as plug and play, and users report no issues connecting the box during installation.
9 customers mention throttle response, 8 positive, 1 negative
The auto part delivers increased throttle response throughout the entire rpm range. Customers report that it greatly improves overall drivability and provides more power and torque in the low and mid range.
...and they improve idle dramatically and greatly improve overall drivability. Great piece of kit..Read more
8 customers mention starting performance, 8 positive, 0 negative
The auto part improves starting performance, making cars start easier in all weather conditions. Customers report stronger starts and great improvement on startup and power.
7 customers mention ignition, 7 positive, 0 negative
Customers appreciate the ignition performance of this auto part. They report good spark and describe it as great ignition with powerful spark at higher RPMs. The part helps give a boost in spark and provides multiple spark output. Users consider it a tremendous upgrade on the factory ignition system.
6 customers mention performance, 6 positive, 0 negative
Customers report that the auto part significantly improves their car's performance. They mention the car drives better than ever before, runs much smoother, and the improvement is noticeable. The part makes the car smoother and runs sweet, with customers describing it as a great job overall.
6 customers mention effectiveness, 3 positive, 3 negative
Customers have mixed experiences with this auto part's effectiveness. Some find it a perfect add-on and highly recommend it for moderate to highly modified rigs. However, others report compatibility issues, noting it is not compatible with 1999 Toyota Tacoma, Nissan D-21 trucks, and that the ignition system is not compatible. Some customers also mention no positive interaction on replacement.

Top reviews from Canada

  • Jeff MacDonald
    5.0 out of 5 stars Another great MSD product
    Reviewed in Canada on October 27, 2025
    Verified Purchase
    MSD still going strong - replaced my old MSD ignition with the new - and it works awesome.
    Helpful
     Report
  • Bill McKeeman
    5.0 out of 5 stars Worked perfect
    Reviewed in Canada on February 16, 2026
    Verified Purchase
    Bought this one because my old one was acting up, now my old one is my back up. Shopped around a lot for this item, this one from this vendor was the best value.
    Helpful
     Report
  • neekamv8
    5.0 out of 5 stars 70s-80's Aston Martin V8s
    Reviewed in Canada on November 5, 2019
    Verified Purchase
    I have fitted these units ( mostly as a kit from Steelwings which includes the 6AL, MSD coil and MSD distributor ) onto several Vintage Aston Martin V8s ( mid 70s to mid 80's vintage ) and they improve idle dramatically and greatly improve overall drivability. Great piece of kit..
    One person found this helpful
    Helpful
     Report
  • todd
    5.0 out of 5 stars Msd
    Reviewed in Canada on July 5, 2020
    Verified Purchase
    Works well msd best product
    Helpful
     Report
  • Holls
    5.0 out of 5 stars Ignition Control Box
    Reviewed in Canada on August 18, 2019
    Verified Purchase
    works great
    Helpful
     Report
  • Paul
    5.0 out of 5 stars great price, fast delivery
    Reviewed in Canada on February 9, 2020
    Verified Purchase
    arrived in one day. great price
    One person found this helpful
    Helpful
     Report
  • emichael
    5.0 out of 5 stars Five Stars
    Reviewed in Canada on July 20, 2018
    Verified Purchase
    number 1 works perfect
    One person found this helpful
    Helpful
     Report
  • Jalexander, 27
    1.0 out of 5 stars Didn’t Work
    Reviewed in Canada on December 27, 2021
    Verified Purchase
    Wasted $500 on this thing and it was non-functional. Stupid of me to order it from 鶹, but I was desperate to have it come quickly. I’m sure others do work, but it’s up to you if you want to take that risk, because buying it from 鶹 does not include a warranty.
    3 people found this helpful
    Helpful
     Report

Top reviews from other countries

Translate all reviews to English
  • Bob Rains
    5.0 out of 5 stars Fantastic performance
    Reviewed in the United States on August 14, 2019
    Verified Purchase
    I installed this on an older 95 LT1 v8 it really helped give it a boost in spark and car runs well.
    Note this was not a stock engine. It has a large cam, ported heads and Headers.
    Another note. I also have the MSD coil but still use the stock opti spark distributer.
    one thing that makes a big difference is using the correct oil seal on the distributer once I finally installed the proper oil seal that looks like a standard oil seal all the problems with the opti spark went away after cleaning the oil out of the inside. Don't need to waste money on a 595.00 MSD distributer. Iv'e only heard bad reviews about them. this opti spark distributer was only 45.99
    Report
  • Roberto C.
    5.0 out of 5 stars Excelente
    Reviewed in Mexico on August 5, 2023
    Verified Purchase
    Muy buen producto recupera entre 10 y 15 caballos, las conexiones simples y de muy buena calidad vale la pena la inversión para actualizar el encendido de un clasico
    Report
  • Catalino
    5.0 out of 5 stars Awesome product
    Reviewed in the United States on June 13, 2013
    Verified Purchase
    I received DOA MSD control boxes from 鶹, however the third box I received finally did the trick! At first, I believe it was the installation or how my car was pre-wired, however after calling MSD and troubleshooting with them, I was convinced it was the MSD box. I have a smoother ride, more power/torque felt in the low/mid range, starts easier and faster (it already started great, but you can feel/hear the difference with the digital 6AL). Gas mileage, surprisingly, increased. Well worth the investment.

    My car is a 1973, Datsun 240Z with triple weber carbs, headers, and pertronix 1 elec. ignition. Please note I changed my Pertronix Coil to an MSD coil during troubleshooting before realizing the Box was the culprit, so not sure, but I doubt if the Pertronix coil is compatible with the 6AL.
    Report
  • Marco
    1.0 out of 5 stars FALLA
    Reviewed in Mexico on November 15, 2019
    Verified Purchase
    solo funciono un poco mas de un mes y fallo
    Report
  • 鶹 Customer
    1.0 out of 5 stars el encendido electronico no funciona.
    Reviewed in Mexico on April 3, 2019
    Verified Purchase
    no funciona el encendido electronico y no se donde hacer la devolucion

    Me pueden orientar por favor?
    Report
See more reviews

Product Summary: MSD Ignition 6425 6AL Ignition Control Box

From MSD

4.5 out of 5 stars, 541 ratings

Customer reviews

50+ viewed in past month

Price

No featured offers available

Other sellers

Other sellers

About this Item

  • With soft touch rev control
  • 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 6AL with two rotary dials
  • Same bolt pattern as the original 6AL with a lower profile housing

Product description

Built-In Adjustable Rev-Limit Control. 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. The Digital 6AL delivers over 530 volts to the coil with up to 135mJ of spark energy for every firing. This 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. 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.. CARB EO: D-40-43
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