My Account
My Garage
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order
MY GARAGE Select Vehicle
MY GARAGE

MSD 6423 Ultra 6AL Ignition Control Box - Red

Manufacturer

Picture for manufacturer MSD

Part Number

6423
8 reviews
Sale Price

$362.95

1 left at this price

delivery box

Usually delivered within 2 days

free shipping

FREE SHIPPING

Check out with

ApplePay
Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The MSD Ultra 6AL Ignition Control delivers race-proven performance in a compact, feature-rich package. This advanced ignition controller enhances engine performance by producing a longer, more powerful spark series that lasts for 18 degrees of crankshaft rotation, ensuring more complete combustion and improved throttle response across the RPM range.

Key Features:

  • Multiple spark series output increases spark energy and duration for improved combustion
  • Operates on 7 to 28 volt electrical systems with minimum 7 volt start capability
  • Capable of 15,000 RPM operation at 14.4 volts for high-performance applications
  • Programmable start retard settings: 0, 10, or 20 degrees for easier engine starting
  • Tachometer output provides 0.8 amps per 1,000 RPM for accurate gauge operation
  • Built-in alerts and monitoring capabilities for diagnostics and performance tracking
  • Fully protected against open coil, shorted coil, and open load conditions
  • Maximum output when paired with MSD Blaster HVC (PN 8252) or HVC II (PN 8253) coils
  • Distinctive red anodized aluminum housing for durability and heat dissipation

Designed for street performance and racing applications, the Ultra 6AL provides precise ignition control with protection features that safeguard your investment. The programmable start retard function reduces ignition timing during cranking for easier starts, especially with high-compression engines.

Products specifications

Brand

MSD

Category

Ignition

Color

Red

Connector Gender

FEMALE

Connector Quantity

1

Emission Code

4

Features

Rev Limiter

Grade Type

Performance

Height

3.05

Ignition Type

Performance

Length

10.95

Mount Type

Surface Mount

Mounting Hardware Included

Yes

Primary Voltage

520-540

Product Type

Digital 6AL Ignition Control Box w/Rev Control

Secondary Voltage

45,000

Spark Energy (mJ per spark)

135 - 150

Sub Category

Control Modules

Terminal Gender

MALE

Terminal Quantity

20

Voltage Required

12-15

Warning

California Proposition 65

Warranty

Manufacturer's Limited 1 Year Warranty

Weight and Size

3.3 x 3.8 - 344 grams

Width

10.1

Fast shipping

Great Experience and even better price!!

I tried calling several times with no answer. Then an email took a whole day for a response

Excellent. Fast and accurate.

Was awesome

Needed a diesel fuel cap. Ordered it on a Saturday and received it the following Monday.

Excellent

would like better picture of item

Share icon
Return Policy
Returns are easy at THMotorsports

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy