LS COIL HARNESSES 558-321

$202.95 $179.95
GVMR_558-321
All Holley EFI Ignition Ignition Coil Assembly Wiring Harness Ignition Wire and Related Components Ignition Wiring Harnesses Ignitions and Electrical In Stock Sale Wiring Harnesses
Are you tired of scouring the junkyard for stock ls coil sub harnesses? Introducing the new Holley EFI LS Coil Sub Harness. This coil...

“Big Wire” C-N-P Ignition Sub Harness 558-318

$278.95 $258.25
GVMR_558-318
All Holley EFI Ignition Ignition Harness Ignition Wire and Related Components Ignition Wiring Harnesses Ignitions and Electrical In Stock Sale Wiring Harnesses
"Big Wire" Sub Harness- pre wired with 12ga power and grounds, for optimal performance!“Big Wire” C-N-P Ignition Sub Harness 558-318

For use with Holley® HP and Dominator ECUs and other EFI systems 558-312

$279.95
GVMR_558-312
All Holley EFI Ignition Ignition Harness Ignition Wire and Related Components Ignition Wiring Harnesses Ignitions and Electrical In Stock Sale Wiring Harnesses
HP Smart Coil ignition sub-harness. Includes a pair of coil harnesses for an 8 cylinder engine. These harnesses are similar in design to factory...

Main Power Harness for Avenger EFI, HP EFI, & Dominator EFI 558-308

$102.95 $94.45
GVMR_558-308
All Engine Wiring Harnesses Holley EFI Ignition Ignition Harness Ignition Wire and Related Components Ignitions and Electrical In Stock Sale Wiring Harnesses
This Harness is required with HP or Dominator ECUs. Includes, 13' long, 10 AWG main power harness, Qty. (2) 3/8" ring terminals and shrink...

For use with Holley® HP and Dominator ECUs and other EFI systems 558-307

$194.95 $169.15
GVMR_558-307
All Holley EFI Ignition Ignition Harness Ignition Wire and Related Components Ignition Wiring Harnesses Ignitions and Electrical In Stock Sale Wiring Harnesses
Universal Coil On/Near Plug Harness – Use to connect Holley PN 558-312 or factory GM LSx coil harnesses to Holley HP or Dominator ECU'sFor...

Ford TFI Ignition Harness for Avenger EFI, HP EFI & Dominator EFI 558-305

$130.95 $113.35
GVMR_558-305
All Holley EFI Ignition Ignition Harness Ignition Wire and Related Components Ignition Wiring Harnesses Ignitions and Electrical In Stock Sale Wiring Harnesses
Ford TFI Ignition Harness for Avenger EFI, HP EFI & Dominator EFIFord TFI Ignition Harness for Avenger EFI, HP EFI & Dominator EFI 558-305

HEI Ignition Harness for Avenger EFI, HP EFI & Dominator EFI 558-304

$61.95 $53.33
GVMR_558-304
All Holley EFI Ignition Ignition Harness Ignition Wire and Related Components Ignition Wiring Harnesses Ignitions and Electrical In Stock Sale Wiring Harnesses
HEI Ignition Harness for Avenger EFI, HP EFI & Dominator EFIHEI Ignition Harness for Avenger EFI, HP EFI & Dominator EFI 558-304

Evenly spaced Ford V8 Injector Harness for Jetronic "Bosch EV1" style Injectors 558-213

$204.95 $179.95
GVMR_558-213
.AirFuelDelivery .FuelDelivery .FuelInjectors Air and Fuel Delivery All Fuel Injection Harness Fuel Injector Harnesses Holley EFI Ignitions and Electrical In Stock Sale Wire, Cable and Related Components Wiring Harnesses
Ford V8 Injector Harness for Jetronic "Bosch" style Fuel Injectors (Evenly Spaced)Evenly spaced Ford V8 Injector Harness for Jetronic "Bosch EV1" style Injectors 558-213

Evenly spaced Ford V8 Injector Harness for USCAR / EV6 style Injectors 558-212

$194.95 $175.45
GVMR_558-212
Air and Fuel Delivery All Engine Wiring Harnesses Fuel Injection Harness Holley EFI Ignitions and Electrical In Stock Sale Wire, Cable and Related Components Wiring Harnesses
Ford V8 Injector Harness for Ford USCAR / EV6 style Fuel Injectors (Evenly Spaced)Evenly spaced Ford V8 Injector Harness for USCAR / EV6 style...

Unterminated 16 Injectors MPFI Harness 558-207

$314.95 $164.95
GVMR_558-207
.AirFuelDelivery .FuelDelivery .FuelInjectors Air and Fuel Delivery All Fuel Injection Harness Fuel Injector Harnesses Holley EFI Ignitions and Electrical In Stock Sale Wire, Cable and Related Components Wiring Harnesses
Unterminated 16 injectors MPFI harness Terminated at injector connectors (Bosch style). Harness must be assembled and require crimping Metripak150 connectors. Includes all connectors, pins,...

LSx Injector Harness for HP EFI, Dominator EFI and Terminator X. 558-201

$178.95 $161.05
GVMR_558-201
.AirFuelDelivery .FuelDelivery .FuelInjectors Air and Fuel Delivery All Fuel Injection Harness Fuel Injector Harnesses Holley EFI Ignitions and Electrical In Stock Sale Wire, Cable and Related Components Wiring Harnesses
LSx Injector Harness for HP EFI, Dominator EFI and Terminator X.LSx Injector Harness for HP EFI, Dominator EFI and Terminator X. 558-201

V8 over Manifold, Bosch Style Injector Harness 558-200

$202.95 $179.95
GVMR_558-200
.AirFuelDelivery .FuelDelivery .FuelInjectors Air and Fuel Delivery All Fuel Injection Harness Fuel Injector Harnesses Holley EFI Ignitions and Electrical In Stock Sale Wire, Cable and Related Components Wiring Harnesses
V8 over Manifold, Bosch Style Connector Harness for Avenger EFI, HP EFI, Dominator EFI and Terminator X. GM / Chrysler Cylinder OrientationV8 over Manifold,...

Use with Terminator X or X Max Systems Only 558-132

$169.95 $147.55
GVMR_558-132
Air and Fuel Delivery All Engine Wiring Harnesses Fuel Injection Wiring Harness Adapter Hardware, Fasteners and Fittings Holley EFI Ignitions and Electrical In Stock Sale Wiring Harnesses
2009+ Gen III Hemi engines rolled off the showroom floor with Variable Valve Timing (VVT). Now, both Terminator X and Terminator X Max ECUs...

Plug and Play with fuel injected 5.0L Small Block Ford Engines 558-128

$562.95 $493.95
GVMR_558-128
All Engine Engine Wiring Harness Engine Wiring Harnesses Holley EFI Ignitions and Electrical In Stock Sale Wire, Cable and Related Components Wiring Harnesses
This harness is for fuel injected small block ford engines, such as 5.0L, or 5.8L Windsor powerplants. Plug and play ignition capability with Dual...

Firmware Updating - Dash Configuration - ECU Testing 558-127

$239.95 $231.95
GVMR_558-127
All Engine Wiring Harnesses Holley EFI Ignition Ignition Harness Ignition Wire and Related Components Ignitions and Electrical In Stock Sale Wiring Harnesses
Also includes a power switch for quick setup in your workspace. Power and Ground flying leads need to be connected to your battery or...

Pre-Terminated J1A / J1B 15' Flying Lead Main Harness 558-126

$439.95 $382.95
GVMR_558-126
All Engine Engine Wiring Harness Holley EFI Ignition Wiring Harnesses Ignitions and Electrical In Stock Sale Wire, Cable and Related Components Wiring Harnesses
The unterminated main harness comes with both J1A and J1B connectors full terminated with 15' of flying lead wiring.Pre-Terminated J1A / J1B 15' Flying...

Ford MPFI Coil On Plug Main Harness: 558-118

$671.95 $649.95
GVMR_558-118
All Holley EFI Ignition Ignition Harness Ignition Wire and Related Components Ignition Wiring Harnesses Ignitions and Electrical In Stock Sale Wiring Harnesses
This harness provides a plug and play upgrade solution for those seeking to convert to Coil-On-Plug. Additionally we have pre-installed a Power Tap for...

Universal MPFI Coil on Plug Main Harness 558-117

$634.95 $538.95
GVMR_558-117
All Holley EFI Ignition Ignition Harness Ignition Wire and Related Components Ignition Wiring Harnesses Ignitions and Electrical In Stock Sale Wiring Harnesses
This harness provides a plug and play upgrade solution for those seeking to convert to Coil-On-Plug. Additionally we have pre-installed a Power Tap for...

Unterminated Universal Main Harness for HP EFI & Dominator EFI 558-105

$546.95 $475.95
GVMR_558-105
Air and Fuel Delivery All Engine Wiring Harnesses Fuel Injection Harness Holley EFI Ignitions and Electrical In Stock Sale Wire, Cable and Related Components Wiring Harnesses
Unterminated Universal Main Harness for HP EFI & Dominator EFIUnterminated Universal Main Harness for HP EFI & Dominator EFI 558-105

Universal MPFI Main Harness for HP EFI & Dominator EFI 558-104

$546.95 $475.95
GVMR_558-104
Air and Fuel Delivery All Engine Wiring Harnesses Fuel Injection Harness Holley EFI Ignitions and Electrical In Stock Sale Wire, Cable and Related Components Wiring Harnesses
Universal MPFI Main Harness for HP EFI & Dominator EFIUniversal MPFI Main Harness for HP EFI & Dominator EFI 558-104

LS2/3/7+ (58x/4x) Engine Main Harness for HP EFI & Dominator EFI 558-103

$653.95 $568.95
GVMR_558-103
Air and Fuel Delivery All Engine Wiring Harnesses Fuel Injection Harness Holley EFI Ignitions and Electrical In Stock Sale Wire, Cable and Related Components Wiring Harnesses
This harness has been designed to interface with 58x crank and 4x cam sensors. These engines are commonly found in 2006+ Year Model vehicles...

Holley EFI High Flow Dual Solenoid Boost Control Kit 557-201

$463.95 $403.95
GVMR_557-201
Air and Fuel Air and Fuel Delivery All Boost Controllers Holley EFI Ignition Ignition Kit In Stock Primary Ignition Sale Superchargers, Turbochargers and Components Turbocharger Electronic Boost Controller Turbocharger, Supercharger and Ram Air
Introducing the newest development from the Holley EFI engineering team, our EFI high flow dual port boost control kit featuring two solenoids. This kit...

3 Port Boost Control Solenoid Valve 557-200

$188.95 $118.95
GVMR_557-200
Air and Fuel Air and Fuel Delivery All Boost Controllers Holley EFI Ignition Ignition Kit In Stock Primary Ignition Sale Superchargers, Turbochargers and Components Turbocharger Electronic Boost Controller Turbocharger, Supercharger and Ram Air
Includes: (1) solenoid, (1) ECU pigtail harness with factory crimped ECU pin, (3) 3/16" barb fittings, (1) 1/8" NPT plug, (1) Sintered brass muffler....

Solenoid/Nozzle 1000cc/min (800HP) 557-106

$463.95 $449.95
GVMR_557-106
.AirFuelDelivery .FuelDelivery .WaterMethanolInjectionKits Air and Fuel Air and Fuel Cooling Systems and Components Air and Fuel Delivery All Holley EFI In Stock Sale Water / Methanol Injection Nozzle Water Injection System and Components Water/Methanol Injection Components
All components are designed to be compatible with water/methanol mix of up to 50% methanol. The Water/Meth solenoids are run by an injector driver...

High Pressure Water Methanol Pump 557-100

$463.95 $226.95
GVMR_557-100
.AirFuelDelivery .FuelDelivery .WaterMethanolInjectionKits Air and Fuel Air and Fuel Cooling Systems and Components Air and Fuel Delivery All Holley EFI In Stock Sale Water / Methanol Injection Pump Water Injection System and Components Water/Methanol Injection Components
All components are designed to be compatible with water/methanol mix of up to 50% methanol. The Water/Meth solenoids are run by an injector driver...

HOLLEY EFI GEN III HEMI SMART COILS 556-163

$790.95 $456.95
GVMR_556-163
.IgnitionCoils All Holley EFI Ignition Ignition Coil Ignition Coils Ignition Components Ignitions and Electrical In Stock Sale
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...

HOLLEY EFI COYOTE SMART COIL 556-161

$844.95 $718.95
GVMR_556-161
.IgnitionCoils All Holley EFI Ignition Ignition Coil Ignition Coils Ignition Components Ignitions and Electrical In Stock Sale
For new Holley EFI installations on Coyote engines, use with Holley EFI Coyote TI-VCT Main Harness for Smart Coils 558-122 & Smart Coil Ignition...

Sniper EFI Canister Ignition Coil 556-153

$60.40 $56.75
GVMR_556-153
.IgnitionCoils All Holley EFI Ignition Ignition Coil Ignition Coils Ignition Components Ignitions and Electrical In Stock Sale
New for the Sniper EFI product line is a factory replacement Sniper EFI canister style ignition coil. This ignition coil is potted with a...

Sniper EFI Hyperspark CD Ignition Box 556-151

$399.95
GVMR_556-151
All Control Modules Holley EFI Ignition Ignition Boxes and Components Ignition Boxes and Controllers Ignition Performance Module Ignitions and Electrical In Stock Sale
Do you need to upgrade your ignition system due to a recent Sniper EFI installation, but have no idea which option is best? Introducing...

Sniper EFI Coil Driver Module; Amplifies Energy Transferred To Spark Plug; 556-150

$169.00 $148.45
GVMR_556-150
All Control Modules Holley EFI Ignition Ignition Boxes and Components Ignition Boxes and Controllers Ignition Control Module Ignitions and Electrical In Stock Sale
The Sniper EFI Coil Driver Module is designed to be used in place of a capacitive discharge box. This coil driver is utilized to...

HOLLEY SMART COIL – HIGH HORSEPOWER C-N-P V8 KIT 556-128

$787.95 $673.95
GVMR_556-128
.IgnitionCoils All Direct Ignition Coil Kit Holley EFI Ignition Ignition Coil Ignition Coils Ignition Components Ignitions and Electrical In Stock Sale
Do you need precision control over your ignition system? Would your combination benefit from Individual Cylinder Timing Control? Are you experiencing spark issues with...

HOLLEY SMART COIL - C-N-P V8 KIT 556-127

$731.95 $628.95
GVMR_556-127
.IgnitionCoils All Direct Ignition Coil Kit Holley EFI Ignition Ignition Coil Ignition Coils Ignition Components Ignitions and Electrical In Stock Sale
Do you need precision control over your ignition system? Would your combination benefit from Individual Cylinder Timing Control? Are you experiencing spark issues with...

Cam Sync Kit, +600/1.0 inch Raised Cam 556-121

$372.95 $323.95
GVMR_556-121
.Sensors Air and Fuel All Engine Camshaft Position Sensor Fuel Injection Systems and Components - Electronic Holley EFI Ignition In Stock Sale Sensors Speed and Position Sensors
Specifically 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...

Cam Sync Kit w/ Bracket 556-119

$367.95 $314.95
GVMR_556-119
.Sensors Air and Fuel All Engine Camshaft Position Sensor Fuel Injection Systems and Components - Electronic Holley EFI Ignition In Stock Sale Sensors Speed and Position Sensors
Specifically 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...

36-1 Tooth Crank Trigger System for Small Block Chevy 556-116

$762.95 $749.95
GVMR_556-116
All Crank Trigger Kits Distributors, Magnetos and Crank Triggers Holley EFI Ignition Ignition Crank Trigger Kit Ignitions and Electrical In Stock Sale Sensors
Holley's EFI Crank Trigger Kit is engineered to provide an accurate crank speed & position signal to Holley EFI systems in the most-demanding, high...

36-1 Tooth Crank Trigger System for Small Block Ford 556-115

$698.95 $607.95
GVMR_556-115
All Crank Trigger Kits Distributors, Magnetos and Crank Triggers Holley EFI Ignition Ignition Crank Trigger Kit Ignitions and Electrical In Stock Sale Sensors
Holley's EFI Crank Trigger Kit is engineered to provide an accurate crank speed & position signal to Holley EFI systems in the most-demanding, high...
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