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MSD Ignition 6421K - MSD Digital 6AL/6A and 6-Series Ignition Control Boxes

MSD Ignition 6421K - MSD Digital 6AL/6A and 6-Series Ignition Control Boxes

MSD Ignition#121-6421K

Digital 6AL-2 Ignition Control Kit
  • Small Block Chevy
  • Big Block Chevy
    Includes:
  • Digital 6AL-2 Ignition Control
  • Pro-Billet Distributor
  • Blaster 2 Coil
  • Coil Mounting Bracket
  • Red Universal 8.5mm Wire Set

    MSD Ignition 6421K - MSD Digital 6AL/6A and 6-Series Ignition Control Boxes Details

    6-Series Digital Ignition Controls

    MSD is excited to announce the next generation of 6-Series ignition controls: the 6AL-2. This all-new ignition control combines a new housing, new digital controls, and more power in a sleek package. Inside the new cast aluminum housing you'll find an advanced micro-controller that manages the timing and RPM of the ignition. The spark output of the new box has been turned up to 535 volts of primary voltage with spark energy reaching up to 135 millijoules! The multiple sparks of the 6AL-2 burn in the cylinder for 20° of crankshaft rotation to ensure complete combustion. Two more great features are the rev limiters: one for high-end overrev protection and another you can activate off a clutch or transbrake to set a launch limit. This feature will help your car blast off the starting line! Adjustments are made via four rotary dials for 100 RPM increment control. Easily connects to nearly any 12-volt negative ground distributor system. Compatible with 4, 6 and 8 cylinder engines.

    Highlights
  • 100 RPM increment control using 4 rotary dials
  • All-new housing and digital circuits
  • Accepts Hall Effect triggers
  • Managed by an efficient digital controller

    Operating Specifications
  • Spark Energy: 135 mJ per spark
  • Primary Voltage: 535 volts
  • Secondary Voltage: 45,000 volts (tested with Blaster HVC II Coil)
  • Spark Series Duration: 20° crankshaft rotation
  • RPM Range: 12,000 RPM with 14.4 volts
  • Voltage Required: 12 to 18 volts (negative ground)
  • Current Draw: 0.7 amp per 1000 RPM
  • Size: 7" L x 4" W x 2" H
  • Weight: 3 lbs

    Kit Includes
  • Digital 6AL-2 Ignition Control 121-6421
  • Pro-Billet Distributor 121-85551
  • Blaster 2 Coil 121-8202
  • Coil Mounting Bracket 121-8213
  • Red Universal 8.5mm Wire Set 121-31229
  • Coil Wire 121-84039

  • MSD Ignition 6421K - MSD Digital 6AL/6A and 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.

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