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Msd Ignition

MSD Ultra 6AL Ignition Boxes 6423 Box, 6AL, Digital CD, with Rev Limiter, Red, Each

SKU: MSD6423

Ignition Boxes
MSD Ultra 6AL Ignition Boxes 6423 Box, 6AL, Digital CD, with Rev Limiter, Red, Each

Msd Ignition

MSD Ultra 6AL Ignition Boxes 6423 Box, 6AL, Digital CD, with Rev Limiter, Red, Each

SKU: MSD6423

Ignition Boxes
A$759.13
IN STOCK! Est Ship 4-7 days. This item is IN STOCK at one of our warehouses or distribution centres, the ETA is the approximate time required to prepare your order for dispatch.
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Description

The new Ultra 6AL Series ignition boxes deliver full MSD power in a compact, lighter package! The Ultra 6AL Series continues to use a high-speed controller that can make extremely quick compensations to the output voltage, multiple spark series, timing and rpm limits, while maintaining precise timing and accurate rev limiting. The circuits and controller of the MSD have been thoroughly filtered to create protection against Electro Magnetic Interference (EMI). Ultra 6AL Series features a capacitive discharge ignition design. (The majority of stock ignition systems are inductive ignitions, in which the coil must store and step up the voltage to maximum strength in between each firing. At higher RPM, since there's less time to charge the coil to full capacity, the voltage falls short of reaching maximum energy—which results in a loss of power or top end miss.)

MSD Ultra 6AL ignition box details:

* High conversion efficiency ensures minimal heat generation and maximum spark energy output with less current draw from the battery
* High RPM operation and maximum output using the Blaster HVC, PN 8252 or HVC II, PN 8253
* Powerful capacitive discharge of multiple sparks improves performance
* Consistently high spark energy of 135mJ to 150mJ for every firing, from idle to redline RPM
* Increase spark series duration lasts for 18 of crankshaft rotation
* Easily installs on 4, 6, 8-cylinder engines with distributors
* Operates on most 7 to 28 volt electrical systems
* Connects to points, magnetic pickups, and hall/crank input distributors
* Bluetooth connectivity to mobile app interface for settings and monitors
* MSD CAN communication for easy connectivity to MSDView using a CAN MSD Hub and Power Grid USB or CAN-USB Bridge 89982 product
* Fully protected against an open coil, shorted coil and open load
* Compact design full MSD power
* Quickens throttle response and improves starting
* Tach Output
* Launch, Burnout, and Step Retard activation inputs available. This ignition box has a built-in tri step RPM rev limit controlled by the mobile app
* Mobile app available settings: Cylinder selection, Step retard value, Launch RPM value, Burnout RPM value, Max (Race) RPM Value, Start retard value
* Programmable Step Retard: On Ramp time, Off Delay, Off Ramp Time, Engine RPM for activation
* Programmable Start Retard: 0, 10, 20 degrees
* Alerts and monitors available
* High level of security connection from phone to ignition box (encryption), including sequence in push-button implementation
* Maximum programmable retard of 30 degrees
* Ignition boxes are available in red or black

Part Type

Ultra 6AL Ignition Box Red Finish

Data: v4.2 - Upd: 2026-10-13 18:44:13

Specifications

Product Attributes - Brand
MSD Ignition
Product Attributes - Manufacturer's Part Number
6423
Product Attributes - Part Type
Ignition Boxes
Product Attributes - Product Line
MSD Ultra 6AL Ignition Boxes
Product Attributes - UPC
090127145302
Product Attributes - Ignition Box Output
Capacitive discharge
Product Attributes - Circuitry
Digital
Product Attributes - Rev Limiter
Yes
Product Attributes - Timing Retard
One-stage
Product Attributes - Data Acquisition
No
Product Attributes - CD Voltage Output to Coil
520-540 V
Product Attributes - Current Draw
0.8 amps per 1,000 rpm
Product Attributes - Spark Output (millijoules)
150 mJ
Product Attributes - Minimum Operating Voltage
12 V
Product Attributes - Maximum Operating Voltage
15 V
Product Attributes - Length (in.)
3.800 in.
Product Attributes - Width (in.)
3.300 in.
Product Attributes - Ignition Box Color
Red
Product Attributes - Coil Included
No
Product Attributes - Mounting Bracket Included
No
Product Attributes - Coil Wire Included
No
Product Attributes - Warranty
1-year
Product Attributes - Quantity
Sold individually.
Product Attributes - Notes
Features a start retard, step retard, and 3 rev limiters.

Reference Information

Brand Name/s Msd Ignition
StreetFX SKU msd6423
SFX Item ID 4974494
Supplier Item Code 4974494
Manufacturer SKU 6423
Manufacturer UPC 90127145302
Alternative References 6AL

Compatibility

Application Data
  • UniversalYes
    Engine TypeH4
    Application NotesFeatures a start retard, step retard, and 3 rev limiters.
  • UniversalYes
    Engine TypeH6
    Application NotesFeatures a start retard, step retard, and 3 rev limiters.
  • UniversalYes
    Engine TypeL4
    Application NotesFeatures a start retard, step retard, and 3 rev limiters.
  • UniversalYes
    Engine TypeL6
    Application NotesFeatures a start retard, step retard, and 3 rev limiters.
  • UniversalYes
    Engine TypeL8
    Application NotesFeatures a start retard, step retard, and 3 rev limiters.
  • UniversalYes
    Engine TypeV4
    Application NotesFeatures a start retard, step retard, and 3 rev limiters.
  • UniversalYes
    Engine TypeV6
    Application NotesFeatures a start retard, step retard, and 3 rev limiters.
  • UniversalYes
    Engine TypeV8
    Application NotesFeatures a start retard, step retard, and 3 rev limiters.

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