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556-121 Holley EFI Cam Sync Kit, +600/1.0 inch Raised Cam
$330.95Specifically designed for use w/ JESEL and similar external, dry timing-belt, cam drive systems. Includes 3 wire hall-effect sensor (8-20 volts), anodized billet aluminum bracket, mounting hardware, mating connector, and stainless steel 1/4"-20 "flying... -
558-416 Holley EFI Holley EFI LS Main Harness to LS3-style MAP Sensor Adapter
$36.89Holley EFI LS main harnesses have a MAP sensor connecter designed for use with an LS1/2 style MAP sensor. The 558-416 is an adapter harness that can be used to adapt any LS harness that uses an LS1/2 MAP sensor connection to an LS3 MAP. Also great for... -
556-123 Holley EFI Universal Cam Sync Systems
$338.95Specifically designed for use in unlimited racing applications equipped with an external, dry timing-belt, cam drive system, where the bracket must be remote mounted to a front motor plate or some mounting surface other than a designated cam cover... -
558-113 Holley EFI Ford Modular 2V & 4V Main Harness for use with Holley Smart Coils
$822.95Main Harness for 99-04 2 & 4 Valve Ford Modular (4.6 & 5.4L) Engines for use with Holley Smart Coils -
558-211 Holley EFI Gen III HEMI V8 Injector Harness - Bosch/Jetronic and Holley injectors used for upgrades and racing
$172.95An Injector Harness is required and Holley offers two. The harness with USCAR/Stock injector connectors will cover most applications that are using the factory injectors. The other harness is for the Bosch and Holley (or Jetronic/Minitimer) injector... -
558-440 Holley EFI Universal 4 EV14 Cylinder Injector Harness
$110.95This Universal 4 Cylinder EV14 Injector Harness is designed to be plug and play with HP EFI & Dominator EFI Systems, utilizing our 205 LB/HR Injector Set - Part Number 522-205. -
558-318 Holley EFI C-N-P Ignition Sub Harness
$247.95"Big Wire" Sub Harness- pre wired with 12ga power and grounds, for optimal performance! -
558-115 Holley EFI Gen III Hemi Main Harness, Early, w/ TPS and Idle Air Control Connections
$774.95Gen III HEMI Harness with TPS and Idle Air Control Connections.This wiring harness interfaces a Holley EFI ECU to a Gen III HEMI engine with an aftermarket cable actuated throttle body. It is meant to be used in conjunction with an injector harness, a... -
558-319 Holley EFI Holley EFI Main Power Harness for Coyote Ti-VCT Applications
$55.35Introducing Coyote Twin Independent Variable Cam Timing Control from Holley EFI! Do you have a coyote crate engine going in your dream car? Is your weekend road race warrior powered by a coyote junkyard engine with locked cams? Unlock the full potential... -
561-102 Holley EFI Spark Plug Wire Set
$137.95Holley EFI LS wires are designed to work with Hooker shorty headers to prevent burns resulting in misfires. -
556-127 Holley EFI Coil-Near-Plug Smart Coil Kit
$649.95Do you need precision control over your ignition system? Would your combination benefit from Individual Cylinder Timing Control? Are you experiencing spark issues with your Stock Coils? Are you wanting to convert your Turbocharged Big Block Monstrosity... -
558-422 Holley EFI Ford Coyote (2011-2017) Drive-By-Wire Harness
$253.95Drive-By-Wire harness for 2011-2017 Ford Coyote (5.0L) engines