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Extended holiday returns
Returnable until Jan 31, 2027 Learn more
Returnable until Jan 31, 2027 Learn more
This item's return window has been extended for the holiday season: Returnable until Jan 31, 2027
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
Availability:
Only 2 left in stock, order soon!
Arrives
Nov 7 – Nov 11
At a glance
- Condition
- New
- Style
- Control Box
- Weight
- 1.4 kg
- Color
- Red
- Material
- Plastic
- Display Type
- Digital
- In the box
- MSD Ignition 6425 6AL Ignition Control BoxRed
- Warranty
- Manufacturer's Limited 1 Year Warranty
Features 8
- 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
.
Specs 16
| Color | Red |
|---|---|
| Brand | MSD |
| Material | Plastic |
| Item Weight | 1.4 kg |
| Display Type | Digital |
| Brand Name | MSD |
| UPC | 085132064250 |
| Unit Count | 1 Count |
| Global Trade Identification Number | 50 |
| Number of Packs | 1 |
| Manufacturer | MSD |
| Number of Items | 1 |
| Item Type Name | MSD Ignition 6425 6AL Ignition Control Box , Red |
| Model | 6425 |
| Part Number | 6425 |
| Material Type | Plastic |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Nov 7 – Nov 11
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Learn more about financing & leasing here.
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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.
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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.
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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.
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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
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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.
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Reviewed in the United States on June 12, 2018 by Lidz