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MSD

MSD 6425 Digital 6AL Ignition Control w/ Rev Control - Red

  • Based on 570 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Thursday, Oct 1
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Style: Control Box


Features

  • All wires exit through a locked, sealed connector
  • Efficient components use less current to produce more power
  • Built-in LED for system checks
  • Compatible with 4, 6 or 8-cylinder engines
  • Set an rpm limit with two rotary dials in 100 rpm increments
  • 12-15 Volts, 7 Volt Start
  • .7 Amp per 1,000 RPM
  • High output with 530 volts and 135mJ of spark energy

Description

.

Color: Red


Brand: MSD


Material: Plastic


Item Weight: 1.4 kg


Display Type: Digital


Brand Name: MSD


UPC: 085132064250


Warranty Description: Manufacturer's Limited 1 Year Warranty


Unit Count: 1 Count


Global Trade Identification Number: 50


Number of Packs: 1


Manufacturer: MSD


Number of Items: 1


Included Components: MSD Ignition 6425 6AL Ignition Control Box , Red


Item Type Name: MSD Ignition 6425 6AL Ignition Control Box , Red


Model: 6425


Part Number: 6425


Display Type: Digital


Color: Red


Material Type: Plastic


Item Weight: 1.4 kg


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Oct 1

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

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Similar Products

Top Amazon Reviews

    • Works as it should
Style: Control Box
Works as it should
Reviewed in the United States on November 24, 2025 by Travis 413
    • buen articulo por su valor
Style: Control Box
muy buena trabaja correctamente
Reviewed in the United States on June 2, 2026 by Francisco Oneill
    • Increased throttle response
Style: Control Box
It gave my 1992 302 Ford F150 a more immediate response in terms of acceleration. Be sure to time your engine your after installing the box. The MSD box causes it to retard by a few degrees. Be sure to order the 8874 wiring harness if you also own an f150 of that generation to save yourself from splicing wires. ... show more
Reviewed in the United States on December 7, 2023 by Michael Simms Jr
    • Funciona perfectamente.
Style: Control Box
Recomendado!!
Reviewed in the United States on April 3, 2026 by Nick R.
    • Awesome product
Style: Control Box
I received DOA MSD control boxes from Amazon, 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. ... show more
Reviewed in the United States on June 13, 2013 by Catalino
    • More power More response but....
Style: Control Box
I have to say, This is a very good product.Install is easy. My car starts easier and runs noticeably better at idle and through entire rpm range. My only prob is that I can't change my rpm limit without a ecu reflash. This rpm limiter will work on older cars. I haven't tested it out to see if it will cut at a lower limit than my stock one for s***s n giggles to make sure it actually works. Besides that there are no issues. ... show more
Reviewed in the United States on February 8, 2014 by Mr.T
    • Fantastic performance
Style: Control Box
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 ... show more
Reviewed in the United States on August 14, 2019 by Bob Rains
    • Noticable improvement, great product
Style: Control Box
I've installed these in a few of my Porsche 911s to replace the old capacitive discharge systems of the 60's and 70's. This is a great product, I've never had one fail even on my race cars. The improvement is noticeable; easier starts in all weather, smoother idle, slightly snappier throttle response. The kit comes with little odds and ends to make installation a breeze. ... show more
Reviewed in the United States on June 12, 2018 by Lidz

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