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Holley EFI

Holley EFI HolleySport EV1 Milspec Injector Harness

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The HolleySport EV1 Milspec injector harness utilizes Raychem DR-25 heatshrink tubing and transitions, providing protection from extreme temperatures and external contaminations that frequently cause reliability issues. The injector connectors and pins are Bosch Motorsports pieces featuring double spring contacts and sealed boots. The injector harness is designed and labeled for conventional 1-3-5-7 and 2-4-6-8 cylinder layouts (Small, Big Block, LS Chevrolet and many others). Additionally, this injector harnesses includes a mating 12-Pin Deutsch connector and pins, allowing you to easily upgrade any wiring harness that utilizes EV1 injectors.


  • Raychem heat shrink tubing, transitions, and injector boots for heat and environmental protection
  • 12-Pin Deutsch Connector, allows you to easily convert your existing wiring harness
  • Even-Odd spacing for popular engine platforms
  • Labeled/numbered injector boots for quick and easy cylinder identification

About Holley EFI

Holley is the new standard in EFI! Whether you're engine swapping your classic car or need to manage 4000 horsepower in your twin-turbocharged drag radial race car, Holley EFI has the solutions you need to get your project up and running better than ever!

BrandHolley EFI
Emission Code4
Harness ApplicationUniversal
Harness TypeInjector
Injector ConnectorJetronic / Minitimer (Bosch)
Product TypeHarness
Part Number558-217

This part is legal for sale or use on Racing Use Only Vehicles

The following vehicles are considered Racing Use Only Vehicles:

  • Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street

WARNING: It is against the law to install this part on an Emissions Controlled Vehicle


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    Some parts are not legal for use in California or other states with similar regulations.