msd performance
MSD Performance 6421 Ignition Control
- 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
- 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.
Warranty Information