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

NOS Nos Utv Can-Am X3 Wet Nitrous System

NOS Nos Utv Can-Am X3 Wet Nitrous System

$2,001.93

MSD Spark Plug Wires, Super Conductor, Spiral Core, 8.5mm, Red, Stock Boots, For Mazda, Miata, 1.6/1.8L, Set

MSD Spark Plug Wires, Super Conductor, Spiral Core, 8.5mm, Red, Stock Boots, For Mazda, Miata, 1.6/1.8L, Set

$202.93

Classic Instruments Fuel Tank Sending Unit, Tank Sender 240-33 Ohm, Universal, Zinc

Classic Instruments Fuel Tank Sending Unit, Tank Sender 240-33 Ohm, Universal, Zinc

$104.18