--- product_id: 81800542 title: "6425 Digital 6AL Ignition Control w/Rev Control - Red" brand: "msd" price: "£316.05" currency: GBP in_stock: true reviews_count: 13 category: "Msd" url: https://www.desertcart.co.uk/products/81800542-6425-digital-6al-ignition-control-w-rev-control-red store_origin: GB region: Great Britain --- # Efficient power use boosts spark output Sealed connector for zero-fuss wiring RPM limit set in precise 100 rpm increments 6425 Digital 6AL Ignition Control w/Rev Control - Red **Brand:** msd **Price:** £316.05 **Availability:** ✅ In Stock ## Summary > ⚡ Ignite your ride with precision power and control! ## Quick Answers - **What is this?** 6425 Digital 6AL Ignition Control w/Rev Control - Red by msd - **How much does it cost?** £316.05 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/81800542-6425-digital-6al-ignition-control-w-rev-control-red) ## Best For - msd enthusiasts ## Why This Product - Trusted msd brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Precision RPM Control:** Dual rotary dials let you set your rev limit in 100 rpm increments, giving you ultimate control over engine performance. - • **Built-In Diagnostic LED:** Integrated LED system check keeps you informed at a glance, minimizing downtime and maximizing confidence. - • **Power-Efficient Performance:** Advanced components consume less current while delivering a stronger, more reliable spark for your engine. - • **Plug-and-Play Sealed Connector:** All wires exit through a locked, sealed connector ensuring hassle-free, weatherproof installation. - • **Universal Engine Compatibility:** Seamlessly works with 4, 6, or 8-cylinder engines, making it the versatile choice for any build. ## Overview The MSD 6425 Digital 6AL Ignition Control Box in striking red is a high-performance ignition upgrade designed for 4, 6, and 8-cylinder engines. Featuring a sealed connector for reliable wiring, efficient components that boost spark power while reducing current draw, and dual rotary dials for precise RPM limit settings, it delivers smoother starts, enhanced torque, and improved fuel efficiency. Its built-in LED diagnostics ensure quick system checks, making it a must-have for enthusiasts seeking dependable, customizable ignition control. ## Description . Review: Fantastic performance - 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 Review: Awesome product - I received DOA MSD control boxes from desertcart, 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. ## 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 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B004EGZU42 | | Best Sellers Rank | #131,586 in Automotive ( See Top 100 in Automotive ) #27 in Automotive Replacement Ignition Control Units | | Brand Name | MSD | | Color | Red | | Customer Reviews | 4.6 4.6 out of 5 stars (563) | | Display Type | Digital | | Global Trade Identification Number | 00085132064250 | | Included Components | MSD Ignition 6425 6AL Ignition Control Box , Red | | Item Type Name | MSD Ignition 6425 6AL Ignition Control Box , Red | | Item Weight | 1.4 Kilograms | | Manufacturer | MSD | | Material Type | Plastic | | UPC | 085132064250 | | Unit Count | 1.0 Count | | Warranty Description | Warranty | ## Product Details - **Brand:** MSD - **Color:** Red - **Display Type:** Digital - **Item Weight:** 1.4 Kilograms - **Material:** Plastic ## Images ![6425 Digital 6AL Ignition Control w/Rev Control - Red - Image 1](https://m.media-amazon.com/images/I/71xLd8l9nxL.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: Does it work for the suzuki esteem ??** A: THIS MSD BOX WILL WORK WITH 4,6, & 8 CYLINDER ENGINES. **Q: With this installed, will it need to be tuned or can i just change the timing?** A: This is just the ignition box **Q: Can the Rev limiter be used on a fuel injected engine ? 1990 Mustang.** A: Yes it can, it controls the spark. **Q: Why won’t Amazon ship this item to me in California?** A: But it IS legal in California. https://ww3.arb.ca.gov/msprog/aftermkt/devices/eo/d-40-43.pdf ## Customer Reviews ### ⭐⭐⭐⭐⭐ Fantastic performance *by B***S on August 14, 2019* 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 ### ⭐⭐⭐⭐⭐ Awesome product *by C***O on June 13, 2013* 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. ### ⭐⭐⭐⭐⭐ Review *by N***. on April 3, 2026* Recomendado!! ## Frequently Bought Together - MSD 6425 Digital 6AL Ignition Control w/Rev Control - Red - MSD 8202 Blaster 2 Hi-Performance Coil - MSD 85551 Pro-Billet Distributor --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/81800542-6425-digital-6al-ignition-control-w-rev-control-red](https://www.desertcart.co.uk/products/81800542-6425-digital-6al-ignition-control-w-rev-control-red) --- *Product available on Desertcart Great Britain* *Store origin: GB* *Last updated: 2026-04-22*