6EFI Igniton Box

The MSD 6EFI Ignition Box (Part Number 6415) is a digital CD ignition control system engineered for high-performance engine management. This compact ignition box delivers multi-spark capability and peak output of 43,000 volts, providing the reliable spark energy required for consistent combustion across a wide RPM range. Designed for custom engine builds and performance applications, the 6EFI combines proven MSD Ignition technology with digital fuel injection compatibility to maximize ignition precision and engine responsiveness.

At 43,000 volts, the 6EFI generates sufficient spark energy to reliably fire fouled or worn spark plugs and maintain combustion efficiency under load. The integrated multi-spark feature delivers multiple ignition events per cycle at lower RPMs, enhancing throttle response and fuel economy before transitioning to single-spark operation at higher engine speeds. The built-in rev limiter provides adjustable RPM protection, preventing over-revving and safeguarding internal engine components. The compact footprint—measuring 7.4 x 2.1 x 10.7 inches and weighing just 2.3 lbs—permits flexible installation in space-constrained engine bays typical of restorations and modified vehicles.

This ignition box is intended for engine builders, performance enthusiasts, and restoration specialists working on carbureted or fuel-injected engines requiring precise digital ignition control. The 6EFI's digital architecture integrates seamlessly with fuel injection systems, enabling synchronized timing and fueling for optimized power delivery. Builders value MSD Ignition products for their ability to improve starting, idle quality, and sustained high-RPM performance without requiring full engine control computers or extensive wiring modifications.

MSD Ignition's ignition box systems have been the standard in performance engine management for decades, trusted in drag racing, street performance, and off-road applications where reliable spark output and adjustable timing control directly impact power, efficiency, and drivability. The 6EFI positions itself as a bridge technology for builders seeking modern digital ignition capability without full engine computer dependency.