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558-433 | KIT, I/O ADAPTER WITH UNTERMINATED VEHICclose
I/O Adapter w/Unterminated Vehicle HarnessFeatures:Provides ten addiitonal inputs/outputs to the 7" digital dashBrings out connections to a waterproof 26 pin connector similiar to ones used on EFI unitsItem includes USB memory stick to update digital dash firmware that supports adapterBrandHolley EFIEmission Code5Product TypeDigital Dash Harness / Adapter / ModulePart Number558-433..
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558-434 | KIT, I/O ADAPTER WITH TERMINATED VEHICLEclose
I/O Adapter w/Terminated Vehicle HarnessFeatures:Provides ten addiitonal inputs/outputs to the 7" digital dashBrings out connections to a waterproof 26 pin connector similiar to ones used on EFI unitsHarness includes USB memory stick to update digital dash firmware that supports adapterBrandHolley EFIEmission Code5Product TypeDigital Dash Harness / Adapter / ModulePart Number558-434..
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558-435 | UNTERMINATED VEHICLE HARNESS, DIGITAL DAclose
Unterminated Vehicle Harness For Digital DashBrandHolley EFIEmission Code5Product TypeDigital Dash Harness / Adapter / ModulePart Number558-435..
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558-436 | TERMINATED VEHICLE HARNESS, DIGITAL DASHclose
Terminated Vehicle Harness For Digital DashBrandHolley EFIEmission Code5Product TypeDigital Dash Harness / Adapter / ModulePart Number558-436..
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558-438 | SEALED USB CABLE, 15 FTclose
15' long sealed USB data cable BrandHolley EFIEmission Code5Harness TypeAuxiliaryLength15ftProduct TypeUSB Data - Communication CablePart Number558-438..
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558-439 | TERMINATOR 205 LB/HR INJECTOR HARNESSclose
Injector upgrade harness for Terminator Throttle Body Systems. This harness is designed to be plug and play with our 205 lb/hr injector upgrade kit, Part Number 522-205. BrandHolley EFIEmission Code4Product TypeTerminator Throttle Body HarnessPart Number558-439..
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558-440 | UNIVERSAL 4CYL MPFI W/205LB CONNECTORSclose
This Universal 4 Cylinder EV14 Injector Harness is designed to be plug and play with HP EFI & Dominator EFI Systems, utilizing our 205 LB/HR Injector Set - Part Number 522-205.BrandHolley EFIEmission Code4Harness ApplicationUniversalHarness TypeInjectorInjector ConnectorBosch/EV14Product TypeInjector Harness - ConnectorPart Number558-440..
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558-442 | STEALTH TERMINATOR 2X4 SUB HARNESSclose
Introducing 2x4 Terminator Stealth EFI upgrade components. The wait is over. These upgrade components allow you to use your current Terminator Stealth EFI throttle body, install a new main harness, and slave throttle body, and you are finished. This upgrade is also perfect for anyone wanting to convert their 2x4 supercharged combo over to Electronic Fuel Injection!Features:2x4 Side Mount Stealth T..
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558-443 | USB/CAN HARNESS, SNIPER TBIclose
The CAN to USB communication cable provides the user with real tuning time access to the ECU. This cable can be used with Holley EFI, Sniper EFI, and Terminator X Tuning Software. Which can be downloaded for free from the Support section of our website!Features:8’ communication cable for easy access to your ECU.BrandHolley EFIEmission Code5Length8ftProduct TypeUSB Data - Communication CablePart Nu..
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558-444 | DIGITAL DASH SERVICE HARNESSclose
Service replacement digital dash harness. Features:CANBus Connector WiringUSB Connector WiringBrandHolley EFIEmission Code5Product TypeHarness KitPart Number558-444..
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558-445 | CAN ADAPTER-NEW DEVICE TO TWO PIN FEMALEclose
The Holley EFI Can Adapter/Power Harness adapts two pin Holley main harness CAN connectors to new style 4 pin CAN devices.BrandHolley EFIEmission Code5Product TypeCAN Extension HarnessPart Number558-445..
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558-448 | LOOSE J1A-J1B CONNECTOR AND PIN KITclose
If you already have your own wire and simply need the connectors and pins, we have you covered with our new ECU connector and pins kit, allowing you to fully terminate your own custom main harnesses!Features:Pre-Terminated J1A and J1B Tyco Superseal Connectors60x - 20-22ga pre-terminated wires20x - 16-18ga pre-terminated wires30 cavity plugsBrandHolley EFIEmission Code5Product TypeConnector KitPa..
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558-470 | 4R70W/4R75W 98+ TRANS HARNESSclose
Ford 4R70W/4R75W Transmission Harness - Complete terminated harness with j4 connector to operate 1998+ Ford electronic transmissions, for Dominator EFI ONLY!Features:Plug and play fully terminated harnessExtra pressure transducer connector for optional Line pressure sensor (554-136)BrandHolley EFIEmission Code5Harness ApplicationFordHarness TypeTransmissionProduct TypeHarness KitPart Number558-470..
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558-471 | TRANS HARNESS, AODE/4R70W (92-97)close
Ford AODE/4R70W Transmission HarnessFeatures:Plug and play fully terminated harnessBrandHolley EFIEmission Code3Harness ApplicationFordHarness TypeTransmissionProduct TypeHarness KitPart Number558-471..
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558-490 | 7 PIN MAIN HARNESS, SNIPER TBIclose
This harness includes the Switched 12v Power Wire, Main Battery Power and Ground, Fuel Pump Relay, Coil – Input wire, and Magnetic Distributor Input wires. 6' of 3/8" black braided split wire loom has also been included to keep the wires protected and your engine bay clean!Features:1x 5’ 12g Main Battery Power Wire1x 5’ 12g Main Battery Ground Wire1x 30A Fuse with Cover with Mounting Tab for a sec..
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558-491 | 10 PIN HARNESS, SNIPER TBIclose
This harness gives you the access to 2 Ground Trigger Inputs, 3 Ground Trigger Outputs, also the Points Output, Tachometer output, and Digital Gauge Output Wires. The Input Grounds can be used for things such as AC Kick, and nitrous stage activation! The Output Grounds can be used for Electronic Fan Control, or A/C Shutdown at WOT.Features:Wires come individually labeled for easy identification2x ..
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558-493 | SNIPER EFI TO HOLLEY DUAL SYNC HARNESSclose
This ignition adapter ensures your Sniper EFI ignition installation is a snap! Simply plug up both connectors, terminate the Pink Wire to a Switched 12v Ignition Source, and you're finished. Features:Plug and Play Adapter for Sniper EFI with Holley Dual Sync DistributorsBrandHolley Sniper EFIEmission Code3Harness TypeIgnitionProduct TypeIgnition HarnessesPart Number558-493..
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558-503 | HARNESS KIT, TPI/STEALTHRAMclose
An EFI system depends heavily on being supplied a clean and constant voltage source. The grounds of an electrical system are just as important as the power side. Our Holley EFI Harness Kit comes complete with the main harness, power harness and injector harness to support your primary system! Features:Harness Kit Includes: Stealthram/TPI Main Harness, Main Power Harness, V-8 Injector Harness, HEI ..
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558-504 | HARNESS KIT, UNIVERSAL V8 MPFIclose
An EFI system depends heavily on being supplied a clean and constant voltage source. The grounds of an electrical system are just as important as the power side. Our Holley EFI Harness Kit comes complete with the main harness, power harness and injector harness to support your primary system! Features:Harness Kit Includes; Main Power Harness, Universal MPFI Main Harness, v-8 Injector HarnessSimple..
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558-505 | HARNESS KIT, FORD MODULAR 2Vclose
This wiring harness interfaces a Holley EFI ECU to a 2V Modular Ford engine. It is meant to be used in conjunction with an injector harness, a coil harness, and ignition modules. Most stock sensors are used with this harness. Features:Harness Kit Includes: Main Power Harness, Ford Modular Main Harness, Ford V-8 Injector Harness, Ford Modular 2V Coil Harness, Coil DriversSimple InstallationCan be u..
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