MSD's 6AL-2 combines a new cast aluminum housing with digital controls and increased output in a compact package. Its advanced micro-controller manages a built-in two-step rev limiter — one for high-end overrev protection and another activated off a clutch or trans-brake to set a launch limit — with adjustments made via four rotary dials in 100 RPM increments. Spark output reaches 535 volts of primary voltage with up to 135 millijoules of spark energy, and multiple sparks burn for 20 degrees of crankshaft rotation to ensure complete combustion.
Specifications:
- Voltage Required: 12-18V, negative ground
- Maximum RPM: 12,500
- Spark Energy: 135mJ per spark
- Secondary Voltage: 45,000V
- Primary Voltage: 535V
- Current Draw: 0.7 amp per 1,000 RPM
- Weight/Size: 3 lbs, 7"L x 4"W x 2"H
- Color: Red
- Warranty: Manufacturer's Limited 1-Year Warranty
- Part Number: 6421
Accepts Hall-effect, points, and magnetic pickup triggers on nearly any 12-volt negative-ground distributor system.
Compliance: This ignition control carries California Air Resources Board (CARB) Executive Order EO# D-722-2, making it legal for sale and use on Emissions Controlled Vehicles in all 50 states when installed per MSD's application guide.
FAQ
Is the MSD 6421 6AL-2 legal for street use in California?
Yes. It carries CARB EO# D-722-2, making it legal for sale and use on Emissions Controlled Vehicles in all 50 states per MSD's application guide.
How does the built-in 2-step rev limiter work?
One limiter provides high-end overrev protection; the other activates off a clutch or trans-brake to set a launch limit. Both adjust via rotary dials in 100 RPM increments.
What trigger inputs does it accept?
Hall-effect, points, and magnetic pickup triggers.
How much spark energy does the 6AL-2 produce?
Up to 135mJ of spark energy with 535 volts of primary voltage.
