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 Nitrous Flare Jet, Stainless Steel, .035 in, Set of 8

NOS Nitrous Flare Jet, Stainless Steel, .035 in, Set of 8

$112.89

Classic Instruments Gauge Set, White Hot Tach Force Package 1955-59 Chevy Truck, Universal

Classic Instruments Gauge Set, White Hot Tach Force Package 1955-59 Chevy Truck, Universal

$1,721.65

NOS Nitrous Bottle Racer Safety Blow-Off Adapter

NOS Nitrous Bottle Racer Safety Blow-Off Adapter

$152.73