Wiring & Protection

Sold out

Holley

Holley 558-217 Efi Sport Ev1 Milspec Injector Harness

compare

$953.17

The Holley Sport EV1 Milspec injector harness utilizes Raychem DR-25 heat shrink tubing and transitions, providing protection from extreme temperatures and external contaminations that...

-0%

Quick View

Holley

Holley 558-102 LS1/6 (24x/1x) Engine Main Harness

compare

$886.13 $884.75

This harness is designed for LS1/6 Engines, from 1997-2004. This harness interfaces with 24x Crank and 1x Cam sensors. Specifications: Description_DEF Fuel Injection Harness...

Quick View

Holley

Holley 570-100 Coyote Main Harness Connector Kit

compare

$217.20

Introducing EFI Engine Connector Kits - From Holley EFI. With the latest addition to our ever-expanding Wiring Shop, our goal was to provide you...

-0%

Quick View

Holley

Holley 558-103 LS2/3/7+ (58x/4x) Engine Main Harness

compare

$886.13 $884.75

This harness has been designed to interface with 58x crank and 4x cam sensors. These engines are commonly found in 2006+ Year Model vehicles...

Sold out

Quick View

Holley

Holley 534-56 Throttle Body Wiring Harness

compare

$80.97

Closed Loop Wiring Harness for Digital 2 bbl Pro-Jection Specifications: Description_DEF Fuel Injection Wiring Harness Adapter Description_DES Throttle Body Wiring Harness Description_INV PROJECTION 2D...

Sold out

Replacement-Fuel-Injector-Wiring-Harness

Quick View

Holley

Holley 534-153 Replacement Fuel Injector Wiring Harness

compare

$283.12

This is the same fuel injector harness that is used in kit P/N 950-104 Specifications: Description_DEF Fuel Injection Harness Description_DES Replacement Fuel Injector Wiring...

Sold out

2V-Ford-Modular-Efi-Kit,-Ntk-O2,-Jetroni

Quick View

Holley

Holley 550-616N HP EFI ECU & Harness Kits

compare

$5,295.29

Looking for a plug and play kit for your Ford Modular engine The HP ECU allows you to accurately control the fuel and ignition...

Sold out

4V-Ford-Modular-Efi-Kit,-Bosch-O2,-Jetro

Quick View

Holley

Holley 550-617 HP EFI ECU & Harness Kits

compare

$4,574.09

Looking for a plug and play kit for your Ford Modular engine The HP ECU allows you to accurately control the fuel and ignition...

Sold out

4V-Ford-Modular-Efi-Kit,-Ntk-O2,-Jetroni

Quick View

Holley

Holley 550-617N HP EFI ECU & Harness Kits

compare

$5,295.29

Looking for a plug and play kit for your Ford Modular engine The HP ECU allows you to accurately control the fuel and ignition...

Sold out

Quick View

Holley

Holley 534-25-1 Throttle Body Wiring Harness

compare

$438.79

Throttle Body Wiring Harness for 1 bbl & 2 bbl Pro-Jection Systems Specifications: Description_DEF Fuel Injection Wiring Harness Adapter Description_DES Throttle Body Wiring Harness...

Sold out

Quick View

Holley

Holley 534-168 Commander 950 Injector Wiring Harness

compare

$268.26

Replacement Commander 950 4 bbl Throttle Body Injector Wiring Harness Specifications: Description_DEF Fuel Injection Harness Description_DES Commander 950 Injector Wiring Harness Description_FAB Genuine Holley...

Electric-Fan-And-Fuel-Pump-Harness-For-Xfi

Quick View

FAST

FAST 301406 Electric Fan and Fuel Pump Harness for XFI

compare

$141.10

This harness allows you to connect the XFI to an electric fuel pump and an electric fan. Specifications: Description_DEF Fuel Injection Harness Description_EXT This...

-7%

Quick View

Holley

Holley 558-105 Unterminated Universal Main Harness

compare

$808.60 $746.54

Holley products have been the undisputed leader in fuel systems for over 100 years. Holley carburetors power every NASCAR Sprint Cup team and every...

-7%

Quick View

Holley

Holley 558-104 Universal Multi-Point Main Harness

compare

$808.60 $745.91

Universal MPFI Main Harness for HP EFI & Dominator EFI Specifications: Description_DEF Fuel Injection Harness Description_DES Universal Multi-Point Main Harness Description_INV UNIVERSAL MPFI MAIN...

-1%

Quick View

Holley

Holley 558-132 Efi Gen Iii Hemi Vvt And Srv Harness

compare

$268.54 $264.45

2009+ Gen III Hemi engines rolled off the showroom floor with Variable Valve Timing (VVT). Now, both Terminator X and Terminator X Max ECUs...

-24%

Can-Adapter-New-Device-To-Two-Pin-Main-Harness

Quick View

Holley

Holley 558-430 Fuel Injection Wire Harness

compare

$80.20 $60.92

The Holley EFI Can Adapter/Power Harness adapts two pin Holley main harness CAN connectors to new style 4 pin CAN devices. Specifications: Description_DEF Fuel...

Sold out

Efi-Ev6-Unterminated-Injector-Harness-Kit

Quick View

Holley

Holley 558-216 Efi Ev6 Unterminated Injector Harness Kit

compare

$214.06

Introducing the latest addition to the Holley EFI Product Lineup! Our EV6 unterminated injector harness is perfect for anyone wanting to add EV6 injectors...

Sold out

Quick View

Holley

Holley 558-451 CAN Adapter Harness, 12"

compare

$63.64

12 in. Male to Female CAN Adapter Harness (for Racepak and other external CAN devices) Specifications: Description_DEF Fuel Injection Harness Description_DES CAN Adapter Harness,...

Sold out

Ls-Multec-2-Injector-Harness---Early-Tru

Quick View

Holley

Holley 558-214 INJECTOR HARNESS - EARLY TRUCK

compare

$398.20

MULTEC 2 INJECTOR HARNESS - EARLY TRUCK Specifications: Description_DEF Fuel Injection Harness Description_DES INJECTOR HARNESS - EARLY TRUCK Description_KEY harness; injector harness; truck; Multec;...

Sold out

Quick View

Holley

Holley 558-502 Fuel Injection Wire Harness

compare

$1,378.87

An EFI system depends heavily on being supplied a clean and constant voltage source. The grounds of an electrical system are just as important...

Sold out

Efi-Ford-Gt500-And-3V-Drive-By-Wire-Throttle-Body-Harness

Quick View

Holley

Holley 558-461 Efi Ford Gt500 And 3V Drive-By-Wire Throttle Body Harness

compare

$681.04

Introducing a new Holley EFI DBW Throttle Body wiring harness for the OEM (Original Equipment Manufacturer) Ford Throttle Body commonly found on 2005-2010 Mustang...

-1%

Injector-Harness---16-Injectors---Unterminated

Quick View

Holley

Holley 558-207 Unterminated 16 injectors MPFI harness

compare

$458.53 $452.47

Unterminated 16 injectors MPFI harness Terminated at injector connectors (Bosch style). Harness must be assembled and require crimping Metripak150 connectors. Includes all connectors, pins,...

Efi-Injector-Harness---Universal-Unterminated

Quick View

Holley

Holley 558-204 Universal Unterminated Injector Harness

compare

$359.25

Universal Unterminated Injector Harness for HP EFI & Dominator EFI(Bosch EV1 style). Specifications: Description_DEF Fuel Injection Harness Description_DES Universal Unterminated Injector Harness Description_KEY Injector...

Sold out

Quick View

Holley

Holley 558-508 Universal Ford V-8 Harness Kit

compare

$1,268.73

Universal Ford V8 Harness Kit for Holley HP and Dominator ECU's Specifications: Description_ASC NOTICE: You will need to purchase an ECU and O2 Sensor...

-1%

Gen-Iii-Hemi-Main-Harness-,-Late,-WTps-And-Idle-Air-Control-Connections

Quick View

Holley

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

compare

$1,119.93 $1,102.49

Gen III HEMI Harness with TPS and Idle Air Control Connections. This wiring harness interfaces a Holley EFI ECU to a Gen III HEMI...

-8%

Sold out

Quick View

Holley

Holley 558-406 Dominator EFI GM Drive By Wire Harness

compare

$382.09 $348.59

Dominator EFI GM Drive-By-Wire Harness Specifications: Description_DEF Fuel Injection Harness Description_DES Dominator EFI GM Drive By Wire Harness Description_EXT Dominator EFI GM Drive By...

-4%

Injector-Harness---Ford-UscarEv6-Style-Injector

Quick View

Holley

Holley 558-212 Ford V8 Injector Harness

compare

$319.31 $305.71

Ford V8 Injector Harness for Ford USCAR / EV6 style Fuel Injectors (Evenly Spaced) Specifications: Description_DEF Fuel Injection Harness Description_EXT Evenly spaced Ford V8...

Sold out

Gm-Dual-Throttle-Body-Drive-By-Wire-Harness

Quick View

Holley

Holley 558-411 GM Dual Throttle Body Drive-By-Wire Harness

compare

$554.93

Dominator EFI GM Dual Drive-By-Wire Harness Specifications: Description_DEF Fuel Injection Harness Description_EXT GM Dual Throttle Body Drive-By-Wire Harness; Description_DES GM Dual Throttle Body Drive-By-Wire...

Sold out

Quick View

Holley

Holley 558-112 Terminator (R) Throttle Body Harness

compare

$1,054.30

Main Engine harness intended for use with Terminator X, X Max, Terminator, HP, and Dominator ECUs when using a Terminator or Terminator Stealth style...

Sold out

Quick View

Holley

Holley 558-453 CAN Adapter Harness, 8'

compare

$95.83

8' Male to Female CAN Adapter Harness (for Racepak and other external CAN devices) Specifications: Description_DEF Fuel Injection Harness Description_EXT CAN Adapter Harness; 8...

Quick View

Holley

Holley 558-219 Injector Driver Harness

compare

$488.76

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...

Sold out

Quick View

Holley

Holley 570-102 MPFI/TPI Main Harness Connector Kit

compare

$214.06

Introducing EFI Engine Connector Kits - From Holley EFI. With the latest addition to our ever-expanding Wiring Shop, our goal was to provide you...

Sold out

Quick View

Holley

Holley 570-104 Hemi Main Harness Connector Kit

compare

$236.01

Introducing EFI Engine Connector Kits - From Holley EFI. With the latest addition to our ever-expanding Wiring Shop, our goal was to provide you...

-16%

Quick View

Holley

Holley 558-428 Fuel Injection Wire Harness

compare

$100.67 $84.04

Can Extension Harness (for Racepak and other external CAN drives) Specifications: Description_DEF Fuel Injection Harness Description_DES Fuel Injection Wire Harness Description_FAB Fuel Injection Wire...