For Hemi combinations currently using Holley EFI or Terminator X, use Smart Coil Ignition Harnesses 558-312 & Coil Extension Harnesses 558-326 for a plug and play solution.

Features

Direct bolt-on to factory valve covers

Same wiring pinout as other IGN-1A coils for easy plugin upgrades (Will not work with factory wiring)

More spark energy than any other smart coil on the market for maximum fuel burn during combustion sequence

Low current draw means less demand on the electrical and charging system

Built-in ignitor for compatibility with Holley EFI and many other aftermarket ECU’s

Maximum operating voltage of 18 volts – for compatibility with both 12 volt and 16 volt electrical systems found in many performance/race applications