SKU: 64581389142

MSD Ultra 6AL Ignition Box With Rev Limiter Red # MSD6423

Sale price$303.75 Regular price$337.50
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Description

MSD Ultra 6AL Ignition Box With Rev Limiter Red # MSD6423Ignition Box, MSD Ultra 6AL, Digital CD, with Rev Limiter, Red, Each Compact design full MSD power. Bluetooth service only available within the USA and Canada. Bluetooth service not compatible for use in Australia. Ignition Box Output: Capacitive discharge Circuitry: Digital Rev Limiter: Yes Timing Retard: One stage Data Acquisition: No CD Voltage Output to Coil: 520 540 V Current Draw: 0. 8 amps per 1,000 rpm Spark Output (millijoules): 150 mJ

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

Compact design - full MSD power. Bluetooth service only available within the USA and Canada.

Bluetooth service not compatible for use in Australia.

Ignition Box Output:

Capacitive discharge

Circuitry:

Digital

Rev Limiter:

Yes

Timing Retard:

One-stage

Data Acquisition:

No

CD Voltage Output to Coil:

520-540 V

Current Draw:

0.8 amps per 1,000 rpm

Spark Output (millijoules):

150 mJ

Minimum Operating Voltage:

12 V

Maximum Operating Voltage:

15 V

Length (in.):

3.800 in.

Width (in.):

3.300 in.

Ignition Box Color:

Red

Coil Included:

No

Warranty:

1-year

Quantity:

Sold individually.

Notes:

Features a start retard, step retard, and 3 rev limiters.

MSD Ultra 6AL Ignition Boxes

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 energywhich 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

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 64581389142

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Peanut
Los Angeles, US
★★★★★ 5
Easy install shelving with heavy duty anchors
Color: Black, Size: 15.7"
Love this! The hardware includes heavy duty anchors, so this will allow objects that has some weight. The shelves can be arranged any way you like.
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Reviewed in the United States on May 17, 2026
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Ellen Mitchell
Massapequa, US
★★★★★ 5
Fun!
Color: Black, Size: 15.7"
Easy install and cute!
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Reviewed in the United States on April 29, 2026
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Shyla Badagliacca
Waukegan, US
★★★★★ 5
Very happy
Color: White, Size: 15.7", Color: White, Size: 15.7"
Easy to install, material could have been a little high quality but for the price I’m not complaining, the shelves themselves are very light weight and seem pretty durable but time will tell
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Reviewed in the United States on April 19, 2026
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Amazon Customer
Cuba, US
★★★★★ 5
Recommend these!
Color: Rustic Brown-2pack
Easy install and look pretty on my wall. Good sturdy quality.
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Reviewed in the United States on April 20, 2026
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TechDad805
Pawtucket, US
★★★★★ 5
Great corner unit - love the hole for wires!
Color: White-2pack
Perfect little shelf for our room! We wanted a small little shelf in the corner that could hold a charger and that hole cut out made it perfect for our needs! I really liked the style of it and the little bar around the front. Sometimes cups or something get put on it and this stops them from falling! These shelves feel super sturdy and took me 2 minutes to install!
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Reviewed in the United States on March 18, 2026

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