Holley's GenIII Hemi Smart Coil is a bolt-in ignition upgrade for late-model HEMI engines, producing more spark energy than a stock coil while drawing less current for a hotter spark at the plug without taxing the electrical system.
Specifications:
- Mounting: Direct bolt-on to factory valve covers
- Wiring: IGN-1A pinout (will not work with factory wiring)
- Built-in ignitor: Compatible with Holley EFI, Terminator X, and other aftermarket ECUs
- Max operating voltage: 18V (works with 12V and 16V electrical systems)
- Color: Black
- Configuration: Single coil
- Part Number: 556-162
For Hemi combinations on Holley EFI or Terminator X, pair with Smart Coil Ignition Harness 558-312 and Coil Extension Harness 558-326 for a plug-and-play install.
FAQ
Will this coil work with my factory wiring harness?
No — it uses the same pinout as other IGN-1A coils, so factory wiring is not compatible; a Holley Smart Coil Ignition Harness is required.
What ECUs is this coil compatible with?
It has a built-in ignitor compatible with Holley EFI, Terminator X, and many other aftermarket ECUs.
Is this a single coil or a full set?
This listing is for a single GenIII Hemi Smart Coil in black.
What voltage range does it support?
Up to 18 volts, compatible with both 12-volt and 16-volt racing electrical systems.
