6ALN Circle Track Ignition Control Kit Chevy
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MSD IGNITIONPART NUMBER: 121-6430K

6ALN Circle Track Ignition Control Kit Chevy

Color:

Black
RED
$1,56120
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Circle Track & Road Racing
    6ALN Circle Track Ignition Control Kit
  • Small Block Chevy
  • Big Block Chevy
    Includes:
  • MSD 6ALN Ignition Control Box
  • MSD Pro-Billet Distributor
  • MSD Blaster HVC II Coil
  • Targeted for NASCAR and Off-Road Racing
  • MSD Plug Wires

    The MSD 6ALN was designed with NASCAR racing in mind... in fact, this capacitive discharge high-power ignition is approved by NASCAR! It features the mandatory 6-pin weathertight connector that meets NASCAR ignition wiring rule 20-6.1. The connector provides a tight, positive lock-ing connection with individual seals to keep dirt and moisture away from each connection. All of the MSD's primary wiring meets MIL-86A specifications with special tinned conductors for superior crimps. Inside the strong cast aluminum housing, the multiple sparking CD circuits are encased in a clear two-part silicone elastomer for the ultimate in vibration protec-tion. A special clear baseplate is also installed for easy tech inspection.

    Highlights
  • Designed for Circle Track racing with NASCAR-mandated 6-pin weathertight connector
  • Clear epoxy potting compound for vibration protection
  • Circuit board is encased in a clear two-part silicone elastomer
  • Clear plastic base for easy tech inspection
  • Soft Touch Rev Control is adjustable with RPM modules
  • Accepts breaker points, amplifier, and magnetic pickup trigger inputs
  • No CARB Exemption Order Number

    Operating Specifications
  • Spark Energy: 105-115 mJ per spark up to 15,000 RPM
  • Primary Voltage: 460-480 volts
  • Secondary Voltage: 45,000 volts (tested with Blaster Coil)
  • Spark Series Duration: 20° crankshaft rotation
  • RPM Range: 15,000 RPM with 14.4 volts
  • Voltage Required: 12-18 volt electrical systems
  • Current Draw: 1 amp per 1000 RPM
  • Size: 8" L x 4" W x 2.25" H
  • Weight: 5.1 lbs

    Kit Includes
  • MSD 6ALN Ignition Control Box 121-6430
  • MSD Pro Billet Distributor 121-8356
  • MSD Blaster HVC II Coil 121-8253
  • MSD Plug Wires 121-31229

    Emissions Note:

    This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

    CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART

    High-Output Ignition Boxes for Maximum Spark Energy

    MSD 6-Series Ignition Boxes set the standard for quick starts, increased power, smooth idle, crisp throttle response, and reduced spark plug fouling. MSD Ignitions Boxes are available in several styles and install easily in multiple applications.

    Show More

    Unlock the true potential of your engine with the MSD 6-Series Ignition Control Boxes, a trusted choice for performance enthusiasts and racers alike. Whether you're cruising on the street or running hard at the track, the MSD 6-Series delivers the high-energy spark needed for complete combustion and maximum horsepower.

    Built with reliability and power in mind, the MSD 6 Series ignition boxes feature capacitive discharge (CD) technology that produces multiple sparks during the combustion cycle, resulting in smoother idling, quicker starts, and improved throttle response. This multi-spark feature is especially beneficial at lower RPMs, ensuring more efficient fuel burn and fewer misfires.

    The MSD 6 Series Ignition units are housed in a durable, vibration-resistant aluminum case that’s ready for the rigors of street or strip. Easy to install and compatible with a wide range of engines and distributors, this versatile ignition box is a go-to upgrade for those looking to enhance overall engine performance.

    Whether you're running naturally aspirated or forced induction, the MSD 6 Series Ignition Control gives you the confidence of consistent spark delivery at high RPMs, helping your engine perform at its peak when it matters most. With several models available—including options for street, marine, and racing applications—there’s a 6-Series box tailored to your build.

    Choose MSD for proven ignition technology that boosts performance, improves efficiency, and ensures your engine fires strong every time.

    The MSD 6 Series Ignition Control Boxes are a cornerstone upgrade for performance enthusiasts seeking stronger spark energy, improved combustion efficiency, and reliable high-RPM performance. Designed to deliver multiple sparks at lower RPM and a powerful single spark at higher engine speeds, MSD 6 Series Ignition Control Boxes help maximize horsepower, throttle response, and overall ignition stability. Whether you’re building a street-driven muscle car or a dedicated drag racing machine, upgrading your ignition system is one of the most effective ways to improve engine performance and reliability.

    A high-performance ignition control box ensures a more complete fuel burn, which translates to smoother idle quality, quicker acceleration, and reduced misfires under load. For modified engines with increased compression ratios, aggressive camshafts, or forced induction, a robust ignition system is essential.

    Performance Benefits & Key Features

    MSD 6 Series Ignition Control Boxes are engineered to provide capacitive discharge ignition (CDI), delivering high-voltage spark output and consistent performance across the RPM range. Performance enthusiasts often evaluate ignition systems based on spark energy, rev limiter capability, wiring compatibility, and durability. The multiple spark discharge feature enhances combustion at lower RPM, improving drivability and fuel efficiency in street applications.

    These ignition control boxes are built with rugged housings to withstand vibration, heat, and demanding driving conditions. Adjustable rev limiting functions help protect engines from over-revving, making them ideal for both street performance and competitive racing environments. Improved spark intensity supports stronger combustion in high-compression and boosted engine combinations, contributing to enhanced torque capacity and throttle response.

    MSD 6 Series units are commonly used in street performance builds, drag racing cars, circle track applications, and classic muscle car restorations seeking modern ignition reliability.

    Fitment, Compatibility & Applications

    MSD 6 Series Ignition Control Boxes are compatible with a wide range of GM, Ford, and Mopar engines when paired with appropriate distributors and ignition components. Popular applications include Chevrolet Camaro, Chevelle, Ford Mustang, Dodge Challenger, and various small block and big block V8 platforms.

    Designed to integrate with aftermarket distributors and performance coils, these ignition systems provide flexibility across carbureted and select EFI applications. Proper installation ensures seamless compatibility and optimal performance gains.

    If you’re ready to strengthen your ignition system and unlock consistent high-RPM power, explore the MSD 6 Series Ignition Control Boxes at JEGS and equip your build with proven ignition technology trusted by performance enthusiasts worldwide.

Part TypeIgnition Boxes Easy Kit
Product LineMSD 6-Series Ignition Control Boxes
BrandMSD IGNITION
Package Height3 in (76.2 mm)
Package Width6 in (152.4 mm)
Part CategoryPerformance Parts
Primary Resistance0.160 ohms
Housing FinishNatural
Housing Materialbillet aluminum
Ignition Box RequiredYes
Distributor TypeDual Point
AssembledNo
Spark Plug Boot EndsEight 90 degree
Engine Make/SizeChevy Small Block (262-400)
Turns Ratio100:1
Spark Plug Boot ColorGray
Peak Current450 mA
Mounting Bracket IncludedNo
Inductance3.5 mH
Distributor Terminal EndsMale/HEI
Distributor Boot ColorGray
Computer-Controlled CompatibleNo
Secondary Resistance630 ohms
Rfi SuppressionYes
Slip CollarYes
Mechanical Tach DriveNo
Gear MaterialSteel
Coil Internal ConstructionEpoxy
Boot Type90 Degree
Advance TypeMechanical
Diameter (Mm)8.5
Distributor Boot MaterialSilicone
Coil Wire AttachmentMale/HEI
Marine UseNo
Coil StyleU-core
PositionN/A
ColorRED
Wire ColorRed
QuantitySold as a set
Overall Length6 in (152.4 mm)
Ballast Resistor IncludedNo
Maximum Voltage44,000 V
Coil ShapeSquare
Spark Plug Boot MaterialSilicone
Coil ColorBlue
Coil Wire IncludedNo
Trigger StyleDual magnetic
Spark Duration450 uS
Distributor Gear RotationStandard
Conductor StyleSpiral core
Cap StyleMale/HEI
Part FitmentSemi Universal
Package Qty1
Package TypeEA
No Questions
No Reviews

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