316 Stainless steel Cap for 1/4" EGT bungs. 543-164

$152.95 $135.95
GVMR_543-164
.AirFuelDelivery .FuelDelivery Air and Fuel Delivery All Fuel Hose Fitting Hardware, Fasteners and Fittings Holley EFI In Stock Sale
316 Stainless steel Cap for 1/4" EGT bungs.316 Stainless steel Cap for 1/4" EGT bungs. 543-164

Holley EFI 1 Channel EGT Kit 554-184C

$352.95 $312.95
GVMR_554-184C
.Sensors All Emission Control Exhaust Gas Temperature (EGT) Sensor Holley EFI In Stock Sale Sensors
Introducing the Holley EFI Single Channel EGT Kits. Exhaust Gas Temperature data is critical information when your engine tune up is on the ragged...

Plug and Play CANbus Exhaust Gas Temperature Kit, for Holley EFI. 554-186

$1,912.95 $1,699.95
GVMR_554-186
.Sensors All Emission Control Exhaust Gas Temperature (EGT) Sensor Holley EFI In Stock Sale Sensors
Introducing the Holley EFI 8 Channel CANBus EGT Kit. Exhaust Gas Temperature data is critical information when your engine tune up is on the...

Plug and Play CANbus Exhaust Gas Temperature Controller, for Holley EFI. 554-190

$905.95
GVMR_554-190
.Sensors All Emission Control Exhaust Gas Temperature (EGT) Sensor Holley EFI In Stock Popular Search (Search Bar) Sale Sensors
Introducing the Holley EFI 8 Channel CANBus EGT. Exhaust Gas Temperature data is critical information when your engine tune-up is on the ragged edge....

Holley Oxygen Sensor O2 Bung Weld-In Style 534-49

$16.28
GVMR_534-49
.Sensors All Emission Control Holley EFI In Stock Oxygen Sensor Bung Popular Search (Search Bar) Sale Sensors
Oxygen Sensor O2 bung weld in style used for any Application that utilizes an Oxygen SensorHolley Oxygen Sensor O2 Bung Weld-In Style 534-49

316 Stainless steel weldment bung for 1/4" EGT probes. 543-161

$31.39 $27.90
GVMR_543-161
All Holley EFI In Stock Sale Uncategorized
316 Stainless steel weldment bung for 1/4" EGT probes. These high-quality weld bungs feature a built-in step, which keeps the bung held in place during...

316 Stainless steel weldment bungs for 1/4" EGT probes. 543-163

$208.95 $184.95
GVMR_543-163
All Holley EFI In Stock Popular Search (Search Bar) Sale Uncategorized
316 Stainless steel weldment bungs for 1/4" EGT probes. These high-quality weld bungs feature a built-in step, which keeps the bung held in place during...

1/4" EGT PROBE, OPEN TIP 554-178

$141.95 $125.95
GVMR_554-178
.Sensors All Emission Control Exhaust Gas Temperature (EGT) Sensor Holley EFI In Stock Sale Sensors
Exhaust Gas Temperature is a critical indicator of the performance of a typical racing engine.1/4" EGT PROBE, OPEN TIP 554-178

1/4" EGT PROBE, OPEN TIP 554-180

$125.95
GVMR_554-180
.Sensors All Emission Control Exhaust Gas Temperature (EGT) Sensor Holley EFI In Stock Sale Sensors
Exhaust Gas Temperature is a critical indicator of the performance of a typical racing engine.1/4" EGT PROBE, OPEN TIP 554-180

Holley EFI 1 Channel EGT Kit 554-184A

$352.95 $312.95
GVMR_554-184A
.Sensors All Emission Control Exhaust Gas Temperature (EGT) Sensor Holley EFI In Stock Sale Sensors
Introducing the Holley EFI Single Channel EGT Kits. Exhaust Gas Temperature data is critical information when your engine tune up is on the ragged...

Holley EFI Standalone Air/Fuel Wideband 02 Gauge Kit 534-215

$415.95
GVMR_534-215
.AirFuelDelivery .FuelDelivery Air / Fuel Ratio Gauge All Holley EFI In Stock Instrument Panel Sale
Holley EFI fully standalone 2-1/16" Air/Fuel Wideband O2 Gauge Kit. This highly accurate and feature packed unit is designed specifically for use with all...

SSC FEMALE PINS 22-18GA 100PK 571-126

$23.83
GVMR_571-126
All Electrical Connectors Electrical, Lighting and Body Holley EFI In Stock Multi-Purpose Wire Connector Sale
Holley EFI Wiring Shop just keeps getting better! We have one goal, to provide you a one stop solution for all of your wiring...

AMP 064 FEMALE PINS 22GA 100PK 571-127

$49.19 $43.72
GVMR_571-127
All Electrical Connectors Electrical, Lighting and Body Holley EFI In Stock Multi-Purpose Wire Connector Sale
Holley EFI Wiring Shop just keeps getting better! We have one goal, to provide you a one stop solution for all of your wiring...

Plug and Play with Dominator ECU 558-219

$352.95 $312.95
GVMR_558-219
.AirFuelDelivery .FuelDelivery Air and Fuel Delivery All Fuel Injection Harness Holley EFI In Stock Sale Wire, Cable and Related Components
The Holley EFI Injector Driver Harness comes pre-terminated with a J2B connector, for plug and play connectivity with your Dominator ECU. This harness is...

Gen III HEMI Main Harness , Late, w/TPS and Idle Air Control Connections 558-116

$826.95 $799.95
GVMR_558-116
.AirFuelDelivery .FuelDelivery Air and Fuel Delivery All Fuel Injection Harness Holley EFI In Stock Sale Wire, Cable and Related Components
Gen III HEMI Harness with TPS and Idle Air Control Connections. This wiring harness interfaces a Holley EFI ECU to a Gen III HEMI...

GM 4L60/80E Transmission Harness - For 1996-2008 Transmissions only. 558-405

$337.95 $299.95
GVMR_558-405
.AirFuelDelivery .FuelDelivery Air and Fuel Delivery All Fuel Injection Harness Holley EFI In Stock Popular Search (Search Bar) Sale Wire, Cable and Related Components
For 2009+ GM 4L60/80E Transmission use Holley EFI Part Number 558-455.GM 4L60/80E Transmission Harness - For 1996-2008 Transmissions only. 558-405

Holley EFI GM Drive-By-Wire Harness - Early Truck 558-429

$303.95 $269.95
GVMR_558-429
.AirFuelDelivery .FuelDelivery Air and Fuel Delivery All Fuel Injection Harness Holley EFI In Stock Popular Search (Search Bar) Sale Wire, Cable and Related Components
Terminator X Max and Dominator EFI GM DBW Harness-Early Truck. Compatible with GM part number 10379038.Holley EFI GM Drive-By-Wire Harness - Early Truck 558-429

Gen III Hemi Main Harness, Early, w/ TPS and Idle Air Control Connections 558-115

$871.95
GVMR_558-115
.AirFuelDelivery .FuelDelivery Air and Fuel Delivery All Fuel Injection Harness Holley EFI In Stock Sale Wire, Cable and Related Components
This wiring harness interfaces a Holley EFI ECU to a Gen III HEMI engine with an aftermarket cable actuated throttle body. It is meant...

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

$201.95 $178.95
GVMR_558-201
.AirFuelDelivery .FuelDelivery Air and Fuel Delivery All Fuel Injection Harness Holley EFI In Stock Popular Search (Search Bar) Sale Wire, Cable and Related Components
LSx Injector Harness for HP EFI, Dominator EFI and Terminator X.LSx Injector Harness for HP EFI, Dominator EFI and Terminator X. 558-201

Universal 6 Cylinder Injector Harness for HP EFI & Dominator EFI 558-203

$239.95 $212.95
GVMR_558-203
.AirFuelDelivery .FuelDelivery Air and Fuel Delivery All Fuel Injection Harness Holley EFI In Stock Sale Wire, Cable and Related Components
Universal 6 Cylinder Injector Harness for HP EFI & Dominator EFIUniversal 6 Cylinder Injector Harness for HP EFI & Dominator EFI 558-203

Ford Coyote (2011-2017) Drive-By-Wire Harness 558-422

$310.95 $275.95
GVMR_558-422
.AirFuelDelivery .FuelDelivery Air and Fuel Delivery All Fuel Injection Harness Holley EFI In Stock Sale Wire, Cable and Related Components
Drive-By-Wire harness for 2011-2017 Ford Coyote (5.0L) enginesFord Coyote (2011-2017) Drive-By-Wire Harness 558-422

Ford V8 Injector Harness for HP EFI & Dominator EFI 558-209

$281.95 $249.95
GVMR_558-209
.AirFuelDelivery .FuelDelivery Air and Fuel Delivery All Fuel Injection Harness Holley EFI In Stock Sale Wire, Cable and Related Components
Ford V8 Injector Harness for HP EFI & Dominator EFIFord V8 Injector Harness for HP EFI & Dominator EFI 558-209

Gen III HEMI V8 Injector Harness - Stock/USCAR style injectors 558-210

$224.95 $199.95
GVMR_558-210
.AirFuelDelivery .FuelDelivery Air and Fuel Delivery All Fuel Injection Harness Holley EFI In Stock Sale Wire, Cable and Related Components
An Injector Harness is required and Holley offers two. The harness with USCAR/Stock injector connectors will cover most applications that are using the factory...

Gen III HEMI V8 Injector Harness - Bosch/Jetronic and Holley injectors 558-211

$194.95
GVMR_558-211
.AirFuelDelivery .FuelDelivery Air and Fuel Delivery All Fuel Injection Harness Holley EFI In Stock Sale Wire, Cable and Related Components
An Injector Harness is required and Holley offers two. The harness with USCAR/Stock injector connectors will cover most applications that are using the factory...

HP EFI ECU & Harness Kits 550-617N

$3,656.95
GVMR_550-617N
.AirFuelDelivery .FuelDelivery Air and Fuel Delivery All Fuel Injection Harness Holley EFI In Stock Sale Wire, Cable and Related Components
Looking for a plug and play kit for your Ford Modular engine? The HP ECU allows you to accurately control the fuel and ignition...

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

$595.95 $528.95
GVMR_558-104
.AirFuelDelivery .FuelDelivery Air and Fuel Delivery All Fuel Injection Harness Holley EFI In Stock Sale Wire, Cable and Related Components
Universal MPFI Main Harness for HP EFI & Dominator EFIUniversal MPFI Main Harness for HP EFI & Dominator EFI 558-104

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

$595.95 $528.95
GVMR_558-105
.AirFuelDelivery .FuelDelivery Air and Fuel Delivery All Fuel Injection Harness Holley EFI In Stock Sale Wire, Cable and Related Components
Unterminated Universal Main Harness for HP EFI & Dominator EFIUnterminated Universal Main Harness for HP EFI & Dominator EFI 558-105

Ford 2V & 4V Modular Main Harness, For HP EFI & Dominator EFI 558-108

$899.95 $799.95
GVMR_558-108
.AirFuelDelivery .FuelDelivery Air and Fuel Delivery All Fuel Injection Harness Holley EFI In Stock Sale Wire, Cable and Related Components
Main harness for 99-04 2 & 4 Valve Ford Modular (4.6 & 5.4L) Engines.Ford 2V & 4V Modular Main Harness, For HP EFI &...

Main Engine Harness for 24x LS w/TBI 558-111

$787.95 $699.95
GVMR_558-111
.AirFuelDelivery .FuelDelivery Air and Fuel Delivery All Fuel Injection Harness Holley EFI In Stock Sale Wire, Cable and Related Components
Main Engine harness intended for use with Terminator X, X Max, Terminator, HP, and Dominator ECUs when using a Terminator or Terminator Stealth style...

MAIN ENGINE HARNESS FOR 58X LS W/TBI 558-112

$787.95 $699.95
GVMR_558-112
.AirFuelDelivery .FuelDelivery Air and Fuel Delivery All Fuel Injection Harness Holley EFI In Stock Sale Wire, Cable and Related Components
Main Engine harness intended for use with Terminator X, X Max, Terminator, HP, and Dominator ECUs when using a Terminator or Terminator Stealth style...

Terminator X MAX and Dominator EFI GM Drive-By-Wire Harness 558-406

$281.95 $249.95
GVMR_558-406
.AirFuelDelivery .FuelDelivery Air and Fuel Delivery All Fuel Injection Harness Holley EFI In Stock Popular Search (Search Bar) Sale Wire, Cable and Related Components
Terminator X MAX and Dominator EFI GM Drive-By-Wire HarnessTerminator X MAX and Dominator EFI GM Drive-By-Wire Harness 558-406

Dominator EFI GM Dual Drive-By-Wire Harness 558-411

$415.95 $368.95
GVMR_558-411
.AirFuelDelivery .FuelDelivery Air and Fuel Delivery All Fuel Injection Harness Holley EFI In Stock Sale Wire, Cable and Related Components
Dominator EFI GM Dual Drive-By-Wire HarnessDominator EFI GM Dual Drive-By-Wire Harness 558-411

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

$712.95 $632.95
GVMR_558-103
.AirFuelDelivery .FuelDelivery Air and Fuel Delivery All Fuel Injection Harness Holley EFI In Stock Popular Search (Search Bar) Sale Wire, Cable and Related Components
This harness has been designed to interface with 58x crank and 4x cam sensors. These engines are commonly found in 2006+ Year Model vehicles...

CAN Extension Harness - 4' 558-424

$66.95 $59.25
GVMR_558-424
.AirFuelDelivery .FuelDelivery Air and Fuel Delivery All Fuel Injection Harness Holley EFI In Stock Sale Wire, Cable and Related Components
Can Extension Harness (for Racepak and other external CAN drives)CAN Extension Harness - 4' 558-424

CAN Extension Harness - 8' 558-425

$74.95 $65.85
GVMR_558-425
.AirFuelDelivery .FuelDelivery Air and Fuel Delivery All Fuel Injection Harness Holley EFI In Stock Popular Search (Search Bar) Sale Wire, Cable and Related Components
Can Extension Harness (for Racepak and other external CAN drives)CAN Extension Harness - 8' 558-425

CAN EXTENSION HARNESS, 12FT 558-426

$88.95 $79.05
GVMR_558-426
.AirFuelDelivery .FuelDelivery Air and Fuel Delivery All Fuel Injection Harness Holley EFI In Stock Popular Search (Search Bar) Sale Wire, Cable and Related Components
CAN Extension Harness (for Racepak and other external CAN drives)CAN EXTENSION HARNESS, 12FT 558-426
Items 433 to 468 of 832 total

Your cart

×
×