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558-118 | FORD MPFI W/ COP MAIN HARNESSclose
This harness provides a plug and play upgrade solution for those seeking to convert to Coil-On-Plug. Additionally we have pre-installed a Power Tap for easy access to 12v, 5v Reference, and Sensor Grounds. The Ford MPFI C-O-P Main Harness has also been pre-terminated for the stock Pulse Width Modulated Idle Air Control motors commonly found on Fuel Injected Windsor 5.0L engines.Features:Built in C..
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558-121 | 2X4 TERMINATOR STEALTH MAIN 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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558-122 | MAIN HARNESS, FORD COYOTE TI-VCT SMARTclose
Introducing Coyote Twin Independent Variable Cam Timing Control from Holley EFI! Do you have a coyote crate engine going in your dream car? Is your weekend road race warrior powered by a coyote junkyard engine with locked cams? Unlock the full potential of your high revving power plant with the Holley EFI Plug and Play Coyote Ti-VCT Control Module.Features:Plug and Play Coyote Main Engine HarnessC..
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558-124 | SUB HARNESS, FORD COYOTE TI-VCTclose
Introducing Coyote Twin Independent Variable Cam Timing Control from Holley EFI! Do you have a coyote crate engine going in your dream car? Is your weekend road race warrior powered by a coyote junkyard engine with locked cams? Unlock the full potential of your high revving power plant with the Holley EFI Plug and Play Coyote Ti-VCT Control Module.Features:Compatible with HP or Dominator EFITi-VCT..
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558-125 | SUB HARNESS, FORD COYOTE TI-VCTclose
Introducing Coyote Twin Independent Variable Cam Timing Control from Holley EFI! Do you have a coyote crate engine going in your dream car? Is your weekend road race warrior powered by a coyote junkyard engine with locked cams? Unlock the full potential of your high revving power plant with the Holley EFI Plug and Play Coyote Ti-VCT Control Module.Features:Compatible with HP or Dominator EFITi-VCT..
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558-126 | FLYING LEAD MAIN HARNESSclose
The unterminated main harness comes with both J1A and J1B connectors full terminated with 15' of flying lead wiring.Features:15’ long flying lead harness, allows you to completely customize your main harness installation60 Holley Crimped Wires (57x 20 ga, 3x 18 ga)30 optional plug sealsBrandHolley EFIEmission Code4Harness ApplicationUniversalHarness TypeMainProduct TypeUniversal Unterminated Main ..
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558-200 | V-8 INJECTOR HARNESSclose
V8 over Manifold, Bosch Style Connector Harness for Avenger EFI, HP EFI & Dominator EFIBrandHolley EFIEmission Code3Harness ApplicationUniversalHarness TypeInjectorProduct TypeBosch EV1 Style Injector HarnessPart Number558-200..
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558-202 | UNIV. 4 CYL. INJ HARNESSclose
BrandHolley EFIEmission Code3Harness ApplicationUniversalHarness TypeInjectorProduct TypeInjector Harness - ConnectorPart Number558-202..
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558-203 | UNIV 6 CYL INJ HARNESSclose
BrandHolley EFIEmission Code3Harness ApplicationUniversalHarness TypeInjectorProduct TypeInjector Harness - ConnectorPart Number558-203..
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558-204 | UNIV. UNTERMINATED INJ HARNESSclose
Universal Unterminated Injector Harness for HP EFI & Dominator EFI(Bosch EV1 style).BrandHolley EFIEmission Code3Harness ApplicationUniversalHarness TypeInjectorProduct TypeUniversal Unterminated Injector HarnessPart Number558-204..
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558-206 | 2 x 4 TBI INJ HARNESSclose
2x4 BBL Holley TBI Injector Harness for HP EFI & Dominator EFI BrandHolley EFIEmission Code3Harness ApplicationTBIHarness TypeInjectorProduct TypeThrottle Body Injector HarnessPart Number558-206..
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558-207 | UNTERMINATED 16 INJ HARNESSclose
Unterminated 16 injectors MPFI harness Terminated at injector connectors (Bosch style). Harness must be assembled and require crimping Metripak150 connectors. Includes all connectors, pins, terminals, and loom needed. for HP EFI & Dominator EFI BrandHolley EFIEmission Code3Harness ApplicationUniversalHarness TypeInjectorProduct TypeUniversal Unterminated Injector HarnessPart Number558-207..
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558-208 | UNTERMINATED 24 INJ HARNESSclose
Unterminated 24 injector MPFI harness Terminated at injector connectors (Bosch style). Harness must be assembled and require crimping Metripak 150 connectors. Includes all connectors, pins, terminals, and loom needed. for HP EFI & Dominator EFIBrandHolley EFIEmission Code3Harness ApplicationUniversalHarness TypeInjectorProduct TypeUniversal Unterminated Injector HarnessPart Number558-208..
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558-209 | FORD V-8 INJECTOR HARNESSclose
Ford V8 Injector Harness for HP EFI & Dominator EFIBrandHolley EFIEmission Code3Harness ApplicationFordHarness TypeInjectorProduct TypeFord EV1 Style Injector HarnessPart Number558-209..
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558-210 | INJECTOR HARNESS, V8 EVENLY SPACED USCARclose
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 injectors. The other harness is for the Bosch and Holley (or Jetronic/Minitimer) injector connector that is commonly used in aftermarket applications for larger injectors. View the image gallery to see images of both types of injectors.Feat..
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558-211 | INJECTOR HARNESS, V8 EVENLY SPACED JETROclose
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 injectors. The other harness is for the Bosch and Holley (or Jetronic/Minitimer) injector connector that is commonly used in aftermarket applications for larger injectors. View the image gallery to see images of both types of injectors.Feat..
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558-212 | INJECTOR HARNESS, FORD, USCAR, EVENLY SPclose
Ford V8 Injector Harness for Ford USCAR / EV6 style Fuel Injectors (Evenly Spaced)BrandHolley EFIEmission Code3Harness ApplicationFordHarness TypeInjectorProduct TypeFord EV6 Style Injector HarnessPart Number558-212..
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558-213 | INJECTOR HARNESS, FORD, JETRONIC, EVENLYclose
Ford V8 Injector Harness for Jetronic "Bosch" style Fuel Injectors (Evenly Spaced)BrandHolley EFIEmission Code3Harness ApplicationFordHarness TypeInjectorProduct TypeFord EV1 Style Injector HarnessPart Number558-213..
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558-216 | UNIV. UNTERMINATED INJ HARNESS EV6close
Introducing the latest addition to the Holley EFI Product Lineup! Our EV6 unterminated injector harness is perfect for anyone wanting to add EV6 injectors to their engine bay. This harness kit comes with everything you need to build a custom cut to fit EV6 injector harness for an 8 cylinder engine. Don't forget, if you need a quality metripack crimping tool to complete the job, Holley EFI has you..
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558-302 | TACH INPUT IGNITION ADAPTERclose
This is only used on applications using a CD Box, such as an MSD 6AL, while not using timing control.BrandHolley EFIEmission Code3Harness TypeIgnitionIgnition TypeCD Ignition (No Timing Control)Product TypeIgnition HarnessesPart Number558-302..
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