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Holley 558-428 CAN Extension Harness 9in Length
Holley 558-428 CAN Extension Harness 9in Length

Fuel Injection System Wiring Harnesses

$56.25
Holley 558-426 Can Extension Harness 12ft
Holley 558-426 Can Extension Harness 12ft

Fuel Injection System Wiring Harnesses

$84.29
Holley 558-425 CAN Extension Harness 8ft Length
Holley 558-425 CAN Extension Harness 8ft Length

Fuel Injection System Wiring Harnesses

$70.19
Holley 558-420 Wire Harness Kit - EFI Terminator I/O
Holley 558-420 Wire Harness Kit - EFI Terminator I/O

Fuel Injection System Wiring Harnesses

$56.25
Holley 558-416
Holley 558-416 Map Sensor Adapter LS1 & LS2 to LS3

Fuel Injection System Wiring Harnesses

$42.87
Holley 558-409 Sealed USB Cable
Holley 558-409 Sealed USB Cable

Fuel Injection System Components

$99.95
Holley 558-408 Connector & Pin Kit J2A/J2B/J3/J4
Holley 558-408 Connector & Pin Kit J2A/J2B/J3/J4

Wiring Connector Replacement Parts

$233.95
Holley 558-407 Multi Map Selector
Holley 558-407 Multi Map Selector

Pressure Safety Switches

$183.95
Holley 558-406 Drive By Wire Harness GM
Holley 558-406 Drive By Wire Harness GM

Fuel Injection System Wiring Harnesses

$259.95
Holley 558-405 Trans Wiring Harness GM 4L60/80E
Holley 558-405 Trans Wiring Harness GM 4L60/80E

Fuel Injection System Wiring Harnesses

$318.95
Holley 558-404 J4 Connector & Harness
Holley 558-404 J4 Connector & Harness

Fuel Injection System Wiring Harnesses

$238.95
Holley 558-403 J3 Connector & Harness
Holley 558-403 J3 Connector & Harness

Fuel Injection System Wiring Harnesses

$186.95
Holley 558-402 J2B Auxiliary Harness Kit
Holley 558-402 J2B Auxiliary Harness Kit

Fuel Injection System Wiring Harnesses

$186.95
Holley 558-401 Auxiliary Harness J2A Connector
Holley 558-401 Auxiliary Harness J2A Connector

Fuel Injection System Wiring Harnesses

$242.95
Holley 558-400 J1A/B Input/Output Connector
Holley 558-400 J1A/B Input/Output Connector

Fuel Injection System Wiring Harnesses

$135.95
Holley 558-323 Wiring Harness Adapter Hyperspark Ignition
Holley 558-323 Wiring Harness Adapter Hyperspark Ignition

Fuel Injection System Wiring Harnesses

$49.95
Holley 558-321 GM LS Coil Sub Harnesses
Holley 558-321 GM LS Coil Sub Harnesses

Fuel Injection System Wiring Harnesses

$207.95
Holley 558-318
Holley 558-318 Coil-Near-Plug Sub Harness - Big Wire

Fuel Injection System Wiring Harnesses

$304.95
Holley 558-312
Holley 558-312 HP EFI Sub-Harnesses - Smart Coil

Fuel Injection System Wiring Harnesses

$299.95
Holley 558-308 EFI Main Power Harness
Holley 558-308 EFI Main Power Harness

Fuel Injection System Wiring Harnesses

$110.95
Holley 558-307
Holley 558-307 LS Coil On Plug Harness Universal

Fuel Injection System Wiring Harnesses

$199.95
Holley 558-306
Holley 558-306 Universal EFI Ignition Harness un-terminated

Fuel Injection System Wiring Harnesses

$194.95
Holley 558-305 Ford TFI Ignition Harness
Holley 558-305 Ford TFI Ignition Harness

Fuel Injection System Wiring Harnesses

$133.95
Holley 558-304 HEI Ignition Harness
Holley 558-304 HEI Ignition Harness

Fuel Injection System Wiring Harnesses

$63.19
Holley 558-213 Injector Harness Ford w/ Jetronic Injectors
Holley 558-213 Injector Harness Ford w/ Jetronic Injectors

Fuel Injection System Wiring Harnesses

$212.95
Holley 558-207
Holley 558-207 Injector Harness - 16 Injectors - Unterminated

Fuel Injection System Wiring Harnesses

$207.95
Holley 558-204
Holley 558-204 EFI Injector Harness - Universal Unterminated

Fuel Injection System Wiring Harnesses

$239.95
Holley 558-201
Holley 558-201 Injector Wiring Harness V8 EV6 Style Injectors

Fuel Injection System Wiring Harnesses

$189.95
Holley 558-200 Injector Wiring Harness V8 Bosch Style Injectors
Holley 558-200 Injector Wiring Harness V8 Bosch Style Injectors

Fuel Injection System Wiring Harnesses

$212.95
Holley 558-118
Holley 558-118 Ford MPFI Coil On Plug Main Harness

Fuel Injection System Wiring Harnesses

$675.95
Holley 558-117 Universal MPFI Coil On Plug Main Harness
Holley 558-117 Universal MPFI Coil On Plug Main Harness

Fuel Injection System Wiring Harnesses

$623.95
Holley 558-113
Holley 558-113 Main Harness 99-04 Ford Mod Motor w/Smart Coil

Fuel Injection System Wiring Harnesses

$949.95
Holley 558-105 Main Harness - Univesal Un-Terminated
Holley 558-105 Main Harness - Univesal Un-Terminated

Fuel Injection System Wiring Harnesses

$571.95
Holley 558-104
Holley 558-104 Main Harness - Universal MPFI

Fuel Injection System Wiring Harnesses

$571.95
Holley 558-103
Holley 558-103 Main Wiring Harness LS2 & LS3

Fuel Injection System Wiring Harnesses

$675.95
Holley 558-102
Holley 558-102 Main Wiring Harness LS1 & LS6

Fuel Injection System Wiring Harnesses

$675.95
Holley 557-201 Solenoid - Boost Control
Holley 557-201 Solenoid - Boost Control

Boost Controllers

$478.95
Holley 557-200 Solenoid Boost Control
Holley 557-200 Solenoid Boost Control

Boost Controllers

$126.95
Holley 557-106
Holley 557-106 1000cc Solenoid/Nozzle Kit

Water/Methanol Injection System Controllers

$478.95
Holley 557-101
Holley 557-101 Installation Kit - Water /Methanol Injection Sys.

Water/Methanol Injection System Controllers

$305.95
Holley 557-100 Water/Methanol Injection Pump 200psi
Holley 557-100 Water/Methanol Injection Pump 200psi

Water/Methanol Injection System Controllers

$437.95
Holley 556-152 Sniper EFI Hyperspark Ignition Coil
Holley 556-152 Sniper EFI Hyperspark Ignition Coil

Ignition Coils

$65.25
Holley 556-151 Sniper EFI Hyperspark Ignition Box
Holley 556-151 Sniper EFI Hyperspark Ignition Box

Ignition Coil Drivers

$415.95
Sold Out
Holley 556-150 Coil Driver Module - Sniper EFI
Holley 556-150 Coil Driver Module - Sniper EFI

Ignition Coil Drivers

$174.95
Holley 556-128 Coil-Near-Plug Smart Coil Kit - V8 Big Wire
Holley 556-128 Coil-Near-Plug Smart Coil Kit - V8 Big Wire

Ignition Coils

$779.95
Holley 556-127 Smart Coil Kit 8-Cyl
Holley 556-127 Smart Coil Kit 8-Cyl

Ignition Coils

$727.95
Sold Out
Holley 556-123
Holley 556-123 Cam Sync Kit - SBF/BBF

Crankshaft Position Sensors

$399.95
Holley 556-121 Cam Sync Kit - BBC w/ +.600/+1.000 Raised Cam
Holley 556-121 Cam Sync Kit - BBC w/ +.600/+1.000 Raised Cam

Crankshaft Position Sensors

$382.95