These Holley EFI Smart Coils are a bolt-in ignition upgrade for your late model HEMI or Coyote engine. Here's the difference over a stock coil; they produce more spark energy while consuming less power without sacrificing voltage output. This means you get hotter spark at the plug to burn the maximum amount of fuel in each cylinder while using less power from your electrical system.

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:
These Holley EFI Smart Coils are a bolt-in ignition upgrade for your late model HEMI or Coyote engine. Here's the difference over a stock coil; they produce more spark energy while consuming less power without sacrificing voltage output. This means you get hotter spark at the plug to burn the maximum amount of fuel in each cylinder while using less power from your electrical system.

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.

More From This Category

MSD Ignition Coil, Blaster OEM Replacement, For Chrysler, For Dodge, For Jeep, 5.7, 6.1L, Set of 8

MSD Ignition Coil, Blaster OEM Replacement, For Chrysler, For Dodge, For Jeep, 5.7, 6.1L, Set of 8

$1,400.57

MSD Direct Ignition System, DIS, Red, Cam Sync, Coils, Ignition Box, For Chevrolet Small/Big Block, Kit

MSD Direct Ignition System, DIS, Red, Cam Sync, Coils, Ignition Box, For Chevrolet Small/Big Block, Kit

$3,296.59

FAST XR-1A High-Output Coil With Connector

FAST XR-1A High-Output Coil With Connector

$216.71

FAST Firewire Spark Plug Wireset for GM Car with 5.7/6.0/6.2/7.0 LS Engines

FAST Firewire Spark Plug Wireset for GM Car with 5.7/6.0/6.2/7.0 LS Engines

$124.53

CROWCAMS Ice Ignition Leads, LS1, LS2, 9mm Pro, w/ Right Angle Plug, Set

CROWCAMS Ice Ignition Leads, LS1, LS2, 9mm Pro, w/ Right Angle Plug, Set

$174.52