This four-channel coil driver module drives two-wire "dumb" ignition coils, typically used on Ford Modular and late-model Chrysler HEMI engines. Holley EFI ECUs require this module when running two-wire coils; two modules are needed for an eight-cylinder engine using eight coils.
Specifications:
- Channels: Four
- Coil Type: Two-wire "dumb" coils
- Construction: Potted design for engine-compartment installation
- Includes: Input harness with pins for direct connection to HP or Dominator ECU, plus output harness with pigtail ends
- Part Number: 554-112
FAQ
What ECUs does this module work with?
The included input harness connects directly into a Holley HP or Dominator ECU.
How many coils can one module drive?
Each module drives four coils; an eight-cylinder engine running two-wire coils requires two modules.
Do I need to wire the output harness myself?
Yes, the output harness has pigtail ends that must be connected to your specific coils.
Is this module sealed for under-hood use?
Yes, it has a potted design allowing installation in the engine compartment.

