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In-Store Pickup Location

MSD Digital 6AL Ignition Controllers 6425

Ignition Box, MSD 6AL, Digital CD, with Rev Limiter, Red, Each

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  • Order this item and get free delivery and handling on your entire order! Offer excludes truck freight and oversize fees. Valid on orders shipped in the contiguous United States.

Hazardous Material Warning
WARNING
WARNING: Cancer and Reproductive Harm For more information, visit www.P65warnings.ca.gov.

Brand: MSD Ignition

Manufacturer's Part Number: 6425

Part Type: Ignition Boxes

Product Line: MSD Digital 6AL Ignition Controllers

Summit Racing Part Number: MSD-6425

UPC: 085132064250

Ignition Box Output: Capacitive discharge

Circuitry: Digital

Rev Limiter: Yes

Timing Retard: None

Data Acquisition: No

CD Voltage Output to Coil: 520-540 V

Current Draw: 0.7 amps per 1,000 rpm

Spark Output (millijoules): 135-145 Millijoules

Minimum Operating Voltage: 12 V

Maximum Operating Voltage: 15 V

Length (in): 8.000 in.

Height (in): 1.875 in.

Width (in): 4.000 in.

Ignition Box Color: Red

Coil Included: No

Warranty: 1-year

Quantity: Sold individually.

CARB EO Number: D-40-43 (pdf)
To see a list of qualifying vehicles, enter CARB EO Number D-40-43

Emissions: California EO Approved

In-Store Pickup: Choose In-store pick-up (OH, NV, GA, TX) on our web site.

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 their 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!

Warranty

Questions & Answers Ask a Product Question
Q:

Is there anything else I need to install this or is there anything else I should order that would work well with it?

Asked by JACK on August 16, 2017

A:

Thank you for your question. For most street installations, the 6425 will work with your existing distributor so additional parts are not a hard requirement. Many customers choose to also upgrade their coil to a matching MSD unit. If you choose to do so, take a look at the Blaster 2 coil, part number MSD-8202.

Summit RacingSummit Racing Answer - August 17, 2017

+See All Answers (14) Answer This Question

Q:

I replaced the original delco distributor with an MSD 8528 and the coil with a MSD Blaster 2. If I will install a MSD 6AL may I get any improvement, more reliability or what? The car is a 1971 Firebird 350. Is it suggested in this configuration? Thank you in advance.

Asked by GIANLUCA on July 09, 2017

A:

That is a must it's the best stuff on the market it can't be beat

MICHAEL from LA answered on July 17, 2017

+See All Answers (10) Answer This Question

Q:

Will this work on a Chevy 350 small block in a 1972 Chevy Nova SS?

Asked by JACK on August 07, 2017

A:

Yes

WAYNE from NC answered on August 13, 2017

+See All Answers (9) Answer This Question

Q:

Would I be able to figure out how to install this myself with instructions included and maybe a video? Have a 72 Chevy Nova SS with a Chevy 350 SmallBlock and like to hook one of these up

Asked by JACK on August 14, 2017

A:

Yes it's very easy to install. Just follow the simple instructions that it comes with.

BRENNAN from CA answered on August 22, 2017

+See All Answers (6) Answer This Question

+See All Questions (75)

Most Helpful Reviews Review This Product

230 Customer Reviews for MSD Ignition 6425 - MSD Digital 6AL Ignition Controllers

Average Customer Review

5 Star

(197)

4 Star

(22)

3 Star

(5)

2 Star

(1)

1 Star

(5)

+See All 230 Reviews

Msd 6AL ignition box

Summit RacingSummit Racing Verified Purchase

MSD-6425
My first time using an ignition box. Was surprised at how much better the unit made starting, also makes motor smoother, more responsive, and burns fuel better. Wow, I'm impressed. Instructions to ignition box are simple. Easy to install. Quality is great, but most of all, it works. Glad I made this purchase.

11 of 11 found this review helpful.

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Reviewer: from OH

Date: August 01, 2014

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Great upgrade for an HEI system

Summit RacingSummit Racing Verified Purchase

MSD-6425
I replaced my streetfire HEI system with the 6AL and a pro-billet distributor. The change has not only made the car start quicker but it also runs smoother and more efficient. Since it burns the fuel more efficiently my system has leaned out a little. Nothing that a rod change can't fix. The engine feels like it has more power. Definitely recommend! ...read more

10 of 10 found this review helpful.

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Reviewer: from AL

Date: October 28, 2014

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It works!

Summit RacingSummit Racing Verified Purchase

MSD-6425
Smoother idle, more power and better emissions. I have no complaints and easily passing CA smog is just a plus.

9 of 9 found this review helpful.

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Reviewer: from CA

Date: March 06, 2014

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MSD 6AL

Summit RacingSummit Racing Verified Purchase

MSD-6425
Great product, complete with all mounting hardware including vibration mounts. Directions easy to follow. Really like the quick disconnect electrical connections. Would purchase again.

6 of 6 found this review helpful.

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Reviewer: from CT

Date: August 20, 2014

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Watch for differences when replacing old 6A

Summit RacingSummit Racing Verified Purchase

MSD-6425
Aloha All, Replaced an old 6A (failed power lead as it would turn out, fixed and it is still working!). Not a drop in effort. 1. The case size different - Same length, however, it is wider (1/2" or so) this means having to drill out new holes and in my case move washer fluid bottle. 2. The leads now all go to one side (the bottom for me). This again, meant changing leads as they did not reach the new location as thy did before. Oh well, this is hot rodding! Mahalo, Michael ...read more

6 of 8 found this review helpful.

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Reviewer: from United States

Date: March 17, 2014

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Some parts are not legal for use in California or other states with similar laws / regulations

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