msd performance

MSD Performance 6421 Ignition Control

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SKU:
19661139
MPN:
6421_100
Availability:
Usually ships the same or next business day. In stock at our CA, GA, KS, MI, PA, TX warehouses.
Shipping:
Calculated at Checkout
Stock Update:
12/17/2025 11:45:50 AM PST
$449.95
Stock Update:
12/17/2025 11:45:50 AM PST

Description

This item is brand-new, factory sealed.

MSD 6421 6AL-2 Ignition Control with 2-Step Rev Limiter
  • All new housing, digital circuits and performance
  • Built-in 2-step rev control - with rotary dials
  • Higher output with up to 135 m and 535 V
  • Accepts Hall-effect, points and mag pickup triggers
  • Managed by an efficient digital control
  • Manufacturer: MSD Ignition
  • Brand: MSD
  • Model: MSD
  • Item Weight: 3.08 pounds
  • Product Dimensions: 9.45 x 2.36 x 9.45 inches
  • Item model number: 6421
  • Is Discontinued By Manufacturer: No
  • Manufacturer Part Number: MSD-6421
  • OEM Part Number: 6421

MSD is excited to announce the next generation of 6-series ignition controls the 6AL-2. The 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 V of primary voltage with spark energy reaching up to 135millijoules. The multiple sparks of the 6AL-2 burn in the cylinder for 20 degrees of crankshaft rotation to ensure complete combustion. Two more great features are the rev limits. There are two rev limiters; one for high end overrev protection and another you can activate off a clutch or trans brake 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.

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Warranty Information

All Items are Brand New, Factory Sealed and come with a standard warranty. [Read our policies]
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MSD Performance 6421 Ignition Control
$449.95