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, 1999-2014 For Ford 4.6L/5.4L 4-Valve Engines, Red, Set of 8

MSD Ignition Coil, 1999-2014 For Ford 4.6L/5.4L 4-Valve Engines, Red, Set of 8

$728.33

MSD Ignition Coils, Blaster OEM Replacement, Chrysler, Dodge, Jeep, Ram, Volkswagen, Red, Set of 6

MSD Ignition Coils, Blaster OEM Replacement, Chrysler, Dodge, Jeep, Ram, Volkswagen, Red, Set of 6

$485.54

MSD Ignition Coil, Blaster 2, Canister, Round, Oil Filled, Black, 45, 000 V, Each

MSD Ignition Coil, Blaster 2, Canister, Round, Oil Filled, Black, 45, 000 V, Each

$105.78

MSD Ignition Coil, 1998-2014 For Ford 4.6L/5.4L 2-Valve Engines, Black, Set of 8

MSD Ignition Coil, 1998-2014 For Ford 4.6L/5.4L 2-Valve Engines, Black, Set of 8

$749.14