MSD Ignition Coil, 6EFI

The MSD 6EFI coil is designed to be used with the 6EFI ignition box part number 6415.

PART# 86415

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When running an MSD Atomic EFI or similar throttle body fuel injection system with a 6EFI ignition box, the 6EFI ignition coil is made for you. Designed to match the 6EFI ignition, the 6EFI coil has a clean black appearance with logos laser-etched on its black anodized aluminum mounting bracket. It is supplied with four, self-tapping mounting screws and a plug-in harness with color-coded wires for easy installation. The 6EFI coil produces high voltage and current that translate to powerful spark improving engine starting, throttle response, and power throughout the RPM range.


  • Produces high spark energy to ensure the air and fuel in your engine get burned completely to improve starting, throttle response, and supply powerful spark throughout the RPM range
  • Designed to work with the MSD 6EFI Ignition part number 6415 and can also be used with other MSD 6-series ignition boxes such as a 6AL part number 6425
  • The black housing and laser-etched black anodized mounting bracket add great looks and a solid mounting point
  • Four, self-tapping screws are supplied for mounting the coil
  • Provided with a plug-in wiring harness with wire colors that match the 6EFI ignition for an easy installation
  • An MSD spark plug wire boot and terminal come in the kit to convert your existing coil wire from a female, socket connection to a male high energy ignition (H.E.I.) connection if needed


Emission Code3
Inductance4.34 mH
Maximum Voltage45,000 Volts
Peak Current300 mA
Primary Resistance0.43 Ohms
Product TypeCoil
Secondary Resistance4.6K Ohms
Spark duration300 uS
Turns Ratio80:1
Part Number86415


This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles.

The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:

  • 1965 and older U.S. manufactured California Certified vehicles
  • 1967 and older U.S. manufactured Federally Certified vehicles
  • 1967 and older Foreign manufactured vehicle

The following vehicles are considered Racing Use Only Vehicles:

  • Racing Use Only Vehicles are vehicles that are used exclusively for competition and that are not registered and that may never be used on the street

WARNING: It is against the law to install this part on an Emissions Controlled Vehicle

The following vehicles are considered Emissions Controlled Vehicles:

  • 1966 and newer U.S. manufactured California Certified vehicles
  • 1968 and newer U.S. manufactured Federally Certified vehicles
  • 1968 and newer Foreign manufactured vehicle

Tech Resources

Coil output specs obtained when used with the MSD 6EFI ignition box part number 6415.
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