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Wiring Harnesses

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-6%
HOLLEY 558-456 Pro-Dash Harness Un-terminated IO Quick View
HOLLEY

HOLLEY 558-456 Pro-Dash Harness Un-terminated IO

$422.93 $397.55
HLY558-456
All Products Dash Wiring Harnesses HOLLEY Ignitions and Electrical Wiring Harnesses
Dash Wiring Harness - Pins / Plugs / Wires Included - Kit
-6%
HOLLEY 558-432 I/O Adapter for Digital Dash Quick View
HOLLEY

HOLLEY 558-432 I/O Adapter for Digital Dash

$239.63 $223.84
HLY558-432
All Products Dash Wiring Harnesses HOLLEY Ignitions and Electrical Wiring Harnesses
Digital Dash Wiring Harness - Input/Output Extender - Holley Digital Dash - Kit
-6%
HOLLEY 558-426 Can Extension Harness 12ft Quick View
HOLLEY

HOLLEY 558-426 Can Extension Harness 12ft

$118.85 $111.71
HLY558-426
All Products Engine Wiring Harnesses HOLLEY Ignitions and Electrical Wiring Harnesses
CAN Wiring Harness - Extension Harness - 12 ft Long - Black Rubber Coated - Each
HOLLEY 558-463 Adapter Harness Wideband Terminator-X Quick View
HOLLEY

HOLLEY 558-463 Adapter Harness Wideband Terminator-X

$95.86
HLY558-463
All Products Engine Wiring Harnesses HOLLEY Ignitions and Electrical Wiring Harnesses
Wiring Harness Adapter - Terminator X - Wideband - Each
-11%
HOLLEY 558-406 Drive By Wire Harness GM Quick View
HOLLEY

HOLLEY 558-406 Drive By Wire Harness GM

$366.53 $324.80
HLY558-406
All Products Engine Wiring Harnesses HOLLEY Ignitions and Electrical Wiring Harnesses
EFI Wiring Harness - Drive by Wire - Holley Dominator EFI - GM - Each
-11%
HOLLEY 558-420 Wire Harness Kit - EFI Terminator I/O Quick View
HOLLEY

HOLLEY 558-420 Wire Harness Kit - EFI Terminator I/O

$79.31 $70.50
HLY558-420
All Products Fuel Injector Harnesses HOLLEY Ignitions and Electrical Wiring Harnesses
EFI Wiring Harness - Input / Output - Holley Terminator EFI - Each
-6%
HOLLEY 558-416 Map Sensor Adapter LS1 & LS2 to LS3 Quick View
HOLLEY

HOLLEY 558-416 Map Sensor Adapter LS1 & LS2 to LS3

$60.45 $56.56
HLY558-416
All Products Engine Wiring Harnesses HOLLEY Ignitions and Electrical Wiring Harnesses
Wiring Harness Adapter - LS Main Harness to LS3 Map Sensor - Each
-6%
HOLLEY 558-428 CAN Extension Harness 9in Length Quick View
HOLLEY

HOLLEY 558-428 CAN Extension Harness 9in Length

$79.31 $74.13
HLY558-428
All Products Engine Wiring Harnesses HOLLEY Ignitions and Electrical Wiring Harnesses
CAN Wiring Harness - Extension Harness - 9 in Long - Black Rubber Coated - Each
-10%
HOLLEY 558-429 Dominator EFI DBW Harness - Early Truck Quick View
HOLLEY

HOLLEY 558-429 Dominator EFI DBW Harness - Early Truck

$403.19 $361.43
HLY558-429
All Products Engine Wiring Harnesses HOLLEY Ignitions and Electrical Wiring Harnesses
EFI Wiring Harness - Drive by Wire - Holley Dominator EFI - GM - Each
-5%
HOLLEY 558-400 J1A/B Input/Output Connector Quick View
HOLLEY

HOLLEY 558-400 J1A/B Input/Output Connector

$191.69 $180.82
HLY558-400
All Products Engine Wiring Harnesses HOLLEY Ignitions and Electrical Wiring Harnesses
EFI Wiring Harness - J1A/B - Holley Dominator EFI - Each
-9%
HOLLEY 558-430 Can Adapter- New Device to 2-Pin Main Harness Quick View
HOLLEY

HOLLEY 558-430 Can Adapter- New Device to 2-Pin Main Harness

$63.08 $56.80
HLY558-430
All Products Engine Wiring Harnesses HOLLEY Ignitions and Electrical Wiring Harnesses
Data Transfer Cable Adapter - 2 Pin Harness to CAN - Each
-5%
HOLLEY 558-425 CAN Extension Harness 8ft Length Quick View
HOLLEY

HOLLEY 558-425 CAN Extension Harness 8ft Length

$98.97 $93.06
HLY558-425
All Products Engine Wiring Harnesses HOLLEY Ignitions and Electrical Wiring Harnesses
CAN Wiring Harness - Extension Harness - 8 ft Long - Black Rubber Coated - Each
-6%
HOLLEY 558-405 Trans Wire Harness GM 4L60 Pre 2009 - 4L80 Quick View
HOLLEY

HOLLEY 558-405 Trans Wire Harness GM 4L60 Pre 2009 - 4L80

$449.72 $422.15
HLY558-405
All Products Engine Wiring Harnesses HOLLEY Ignitions and Electrical Wiring Harnesses
EFI Wiring Harness - Transmission - Holley Dominator EFI - GM 4L60E / 4L80E - Each
-9%
HOLLEY 558-431 Crank/Cam Ignition Harness Quick View
HOLLEY

HOLLEY 558-431 Crank/Cam Ignition Harness

$146.57 $133.02
HLY558-431
All Products Engine Wiring Harnesses HOLLEY Ignitions and Electrical Wiring Harnesses
EFI Wiring Harness - Camshaft Ignition Harness - Holley HP / Dominator EFI - Universal - Kit
-10%
HOLLEY 558-326 LS Coil Ext. Harness 36in 2pk Quick View
HOLLEY

HOLLEY 558-326 LS Coil Ext. Harness 36in 2pk

$190.28 $170.69
HLY558-326
All Products HOLLEY Ignition Wiring Harnesses Ignitions and Electrical Wiring Harnesses
Ignition Wiring Harness - Coil Extension Harness - GM LS-Series - Pair
-8%
HOLLEY 558-404 J4 Connector & Harness Quick View
HOLLEY

HOLLEY 558-404 J4 Connector & Harness

$336.92 $307.89
HLY558-404
All Products Fuel Injector Harnesses HOLLEY Ignitions and Electrical Wiring Harnesses
EFI Wiring Harness - J4 Auxiliary Harness - Holley Dominator EFI - Each
-10%
HOLLEY 558-402 J2B Auxiliary Harness Kit Quick View
HOLLEY

HOLLEY 558-402 J2B Auxiliary Harness Kit

$263.60 $236.60
HLY558-402
All Products Engine Wiring Harnesses HOLLEY Ignitions and Electrical Wiring Harnesses
EFI Wiring Harness - J2B Auxiliary Connector Harness - Holley Dominator EFI - Universal - Kit
-12%
HOLLEY 558-311 Hemi Coil Harness Late TYCO Quick View
HOLLEY

HOLLEY 558-311 Hemi Coil Harness Late TYCO

$293.21 $255.82
HLY558-311
All Products HOLLEY Ignition Wiring Harnesses Ignitions and Electrical Wiring Harnesses
EFI Wiring Harness - Ignition Coil Wiring - Holley HP / Dominator EFI - Mopar Gen III Hemi - Each
-10%
Sold out
HOLLEY 558-403 J3 Connector & Harness Quick View
HOLLEY

HOLLEY 558-403 J3 Connector & Harness

$263.60 $236.60
HLY558-403
All Products Fuel Injector Harnesses HOLLEY Ignitions and Electrical Wiring Harnesses
Wiring Harness - J3 Auxiliary Input / Output Connector - Dominator EFI - Each
-10%
HOLLEY 558-401 Auxiliary Harness J2A Connector Quick View
HOLLEY

HOLLEY 558-401 Auxiliary Harness J2A Connector

$342.56 $306.59
HLY558-401
All Products Engine Wiring Harnesses HOLLEY Ignitions and Electrical Wiring Harnesses
EFI Wiring Harness - J2A Auxiliary Connector Harness - Holley Dominator EFI - Universal - Kit
-8%
HOLLEY 558-325 EFI Pro-Billet Ignition Adapter Quick View
HOLLEY

HOLLEY 558-325 EFI Pro-Billet Ignition Adapter

$59.36 $54.17
HLY558-325
All Products HOLLEY Ignition Wiring Harnesses Ignitions and Electrical Wiring Harnesses
EFI Wiring Harness - Ignition Adapter Harness - MSD Distributors to Holley EFI - Each
-8%
HOLLEY 558-321 GM LS Coil Sub Harnesses Quick View
HOLLEY

HOLLEY 558-321 GM LS Coil Sub Harnesses

$293.21 $268.87
HLY558-321
All Products HOLLEY Ignition Wiring Harnesses Ignitions and Electrical Wiring Harnesses
Ignition Wiring Harness - Factory Replacement - Injector Sub Harness - GM LS-Series - Pair
-5%
HOLLEY 558-305 Ford TFI Ignition Harness Quick View
HOLLEY

HOLLEY 558-305 Ford TFI Ignition Harness

$188.87 $178.01
HLY558-305
All Products HOLLEY Ignition Wiring Harnesses Ignitions and Electrical Wiring Harnesses
EFI Wiring Harness - Ignition Adapter Harness - Ford TFI Distributor to Holley Avenger / HP / Dominator EFI - Each
-5%
HOLLEY 558-308 EFI Main Power Harness Quick View
HOLLEY

HOLLEY 558-308 EFI Main Power Harness

$156.44 $148.31
HLY558-308
All Products Engine Wiring Harnesses HOLLEY Ignitions and Electrical Wiring Harnesses
EFI Wiring Harness - Main Power - Holley Dominator EFI - Each
-2%
HOLLEY 558-219 Harness Injector Driver Module Quick View
HOLLEY

HOLLEY 558-219 Harness Injector Driver Module

$468.05 $457.82
HLY558-219
All Products Fuel Injector Harnesses HOLLEY Ignitions and Electrical Wiring Harnesses
EFI Wiring Harness - J2B Plug to Dominator ECU Module - Universal - Each
-5%
Sold out
HOLLEY 558-201 Injector Wiring Harness V8 EV6 Style Injectors Quick View
HOLLEY

HOLLEY 558-201 Injector Wiring Harness V8 EV6 Style Injectors

$267.83 $252.89
HLY558-201
All Products Fuel Injector Harnesses HOLLEY Ignitions and Electrical Wiring Harnesses
EFI Wiring Harness - EV6 Style Injectors - Holley Dominator EFI - Each
-6%
HOLLEY 558-304 HEI Ignition Harness Quick View
HOLLEY

HOLLEY 558-304 HEI Ignition Harness

$89.10 $83.73
HLY558-304
All Products HOLLEY Ignition Wiring Harnesses Ignitions and Electrical Wiring Harnesses
EFI Wiring Harness - Ignition Adapter Harness - GM Small Cap HEI Distributor to Holley Avenger / HP / Dominator EFI - Each
-12%
HOLLEY 558-323 Wiring Harness Adapter Hyperspark Ignition Quick View
HOLLEY

HOLLEY 558-323 Wiring Harness Adapter Hyperspark Ignition

$70.43 $61.97
HLY558-323
All Products HOLLEY Ignition Wiring Harnesses Ignitions and Electrical Wiring Harnesses
EFI Wiring Harness - Ignition Adapter Harness - HyperSpark Distributors to Holley EFI - Each
-5%
HOLLEY 558-307 LS Coil On Plug Harness Universal Quick View
HOLLEY

HOLLEY 558-307 LS Coil On Plug Harness Universal

$281.93 $265.62
HLY558-307
All Products HOLLEY Ignition Wiring Harnesses Ignitions and Electrical Wiring Harnesses
Ignition Wiring Harness - Coil-On-Plug to Sub Harness - Holley HP / Dominator EFI - Each
-14%
HOLLEY 558-312 HP EFI Sub-Harnesses - Smart Coil Quick View
HOLLEY

HOLLEY 558-312 HP EFI Sub-Harnesses - Smart Coil

$422.93 $361.73
HLY558-312
All Products HOLLEY Ignition Wiring Harnesses Ignitions and Electrical Wiring Harnesses
EFI Wiring Harness - Smart Coil - Ignition Coil Wiring - Holley HP / Dominator EFI - Universal - Each
-12%
HOLLEY 558-318 Coil-Near-Plug Sub Harness - Big Wire Quick View
HOLLEY

HOLLEY 558-318 Coil-Near-Plug Sub Harness - Big Wire

$429.98 $376.83
HLY558-318
All Products HOLLEY Ignition Wiring Harnesses Ignitions and Electrical Wiring Harnesses
Ignition Wiring Harness - Big Wire C-N-P Sub Harness - V8 - Each
-1%
Sold out
HOLLEY 558-213 Injector Harness Ford w/ Jetronic Injectors Quick View
HOLLEY

HOLLEY 558-213 Injector Harness Ford w/ Jetronic Injectors

$300.26 $294.93
HLY558-213
All Products Fuel Injector Harnesses HOLLEY Ignitions and Electrical Wiring Harnesses
EFI Wiring Harness - EV1 Style Injectors - Ford V8 - Each
-8%
HOLLEY 558-210 Injector Harness V8 Evenly Spaced USCAR Quick View
HOLLEY

HOLLEY 558-210 Injector Harness V8 Evenly Spaced USCAR

$293.21 $267.41
HLY558-210
All Products Fuel Injector Harnesses HOLLEY Ignitions and Electrical Wiring Harnesses
Fuel Injector Harness - Adapter - USCAR EV6 / Stock to Bosch Jetronic / Minitimer - Each
-14%
HOLLEY 558-200 Injector Wiring Harness V8 Bosch Style Injectors Quick View
HOLLEY

HOLLEY 558-200 Injector Wiring Harness V8 Bosch Style Injectors

$300.26 $257.82
HLY558-200
All Products Fuel Injector Harnesses HOLLEY Ignitions and Electrical Wiring Harnesses
EFI Wiring Harness - Bosch Style Injectors - Holley Dominator EFI - Each
-18%
HOLLEY 558-191 Sniper 2 Main Harness w/Fuel Pump Relay Quick View
HOLLEY

HOLLEY 558-191 Sniper 2 Main Harness w/Fuel Pump Relay

$318.59 $260.59
HLY558-191
All Products Engine Wiring Harnesses HOLLEY Ignitions and Electrical Wiring Harnesses
EFI Wiring Harness - Main Battery Harness - Fuel Pump Relay - Sniper 2 EFI - Power Distribution Module - Each
-1%
HOLLEY 558-212 Injector Harness - Ford USCAR/EV6 Style Injector Quick View
HOLLEY

HOLLEY 558-212 Injector Harness - Ford USCAR/EV6 Style Injector

$293.21 $287.99
HLY558-212
All Products Engine Wiring Harnesses HOLLEY Ignitions and Electrical Wiring Harnesses
EFI Wiring Harness - EV6 / USCAR Style Injectors - Holley EFI - Small Block Ford - Each
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