Free Shipping on Performance Auto Parts            Order by 11 PM EST for Same Day Shipping!

MSD Ignition 6420 - MSD Digital 6-Series Ignition Control Boxes

MSD Ignition 6420 - MSD Digital 6-Series Ignition Control Boxes

MSD Ignition#121-6420

6AL Ignition Control Box
**This Item is no longer available has been Replaced by the New Digital 6AL 121-6425
  • CARB E.O Number D-4
      To order this item contact Customer Service at 1-800-345-4545.

    MSD Ignition 6420 - MSD Digital 6-Series Ignition Control Boxes Details

    6-Series Analog Ignition Controls

  • Same as 6A ignition box but with built-in Soft Touch rev control that allows you to set an RPM limit to protect an engine from over-rev damage due to driveline failure or missed shifts
  • Adjustable in 100 RPM increments
  • Rubber shock mounts and 3000, 6000, 7000, and 8000 RPM modules included
  • Other MSD RPM Controls can connect to the 6AL (e.g. 3-Step Module Selector or RPM-Activated Switch)
  • OBD-II approved and 50-state legal via EO #D-40-26

    Operating Specifications:
  • Spark Energy: 105-115mJ (per spark)
  • Primary Voltage: 460 to 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 to 18 volts (negative ground)
  • Current Draw: 1 amp per 1000 RPM
  • Dimensions: 3 lbs.
  • Weight: 8" L x 4" W x 2.25" H
  • CARB E.O Number D-40-26

  • MSD Ignition 6420 - MSD Digital 6-Series Ignition Control Boxes

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

    Digital 6A: Base model with multiple sparking, capacitive discharge (CD) ignition control.
  • Hotter Spark for Improved Driveability
  • Without Rev Limiter - Can Not Be Added

    Digital 6AL: Digital 6AL or 6BTM Ignitions are made for spirited driving, grabbing gears or some form of racing.
  • Includes Adjustable Soft Touch Rev Control
  • Can Add a 2-Step Module Selector for Launch rpm Limit

    Digital 6AL-2: Ideal for the street and strip applications.
  • Includes Built-in 2-Step Rev Control

    Digital 6 Plus: Ideal for 4, 6 and 8-cylinder engine applications.
  • Includes Built-in Drag Race Features, 2-Step Rev Control, Single Stage Retard and Start Retard

    Programmable 6AL-2: Provides PC programming for the street.

    Extreme Duty 6ALN: For severe duty applications such as off-road truck racing or saturday night dirt tracks,
  • Sealed locking connectors and epoxy for vibration resistance create an ignition ready to take on the rigors of hard-core racing.

    Marine: All of the power and multiple sparks of an MSD, plus a rev limiter for Marine applications.
  • Includes sealed Weathertight connectors

    Professional Racing: Designed for professional long duration, high-rpm racing.
  • Features NASCAR mandated harnesses, a clear baseplate and vibration dampening silicone
  • Uses a special Coil (121-8250) & produces higher spark energy and voltage

    JEGS Easy Kits are designed by JEGS professionals to help you get all the performance parts you need.

  • Items You May Also Consider
    Only $244.95

    Only $249.88

    MSD Ignition 8202 - MSD Performance Blaster Coils
    Only $47.95

    JEGS Performance Products 40640 - JEGS Module Holder
    Only $16.99

    JEGS Performance Products 40680 - JEGS Electronics Mounting Plate
    Only $44.99

    JEGS Performance Products 40681 - JEGS Control Box Mounting Plates for MSD Ignition
    Only $17.99

    See All Items You Need