6425 Digital 6AL Ignition Control Box with Adjustable Rev-Limit Control

MSD 121-6425 Digital 6AL Ignition Control Box Features:

Digital design for precise timing
Adjustable RPM rev limiter (plug-in module style)
Compatible with points, electronic, and HEI ignition systems
Multiple spark discharge below 3,000 RPM
Single spark above 3,000 RPM for maximum power
Built-in soft-touch rev control
Weatherproof die-cast housing