HOLLEY EFI 558-212 Injector Harness 090127712870 V8

( Brand: Holley Efi ), ( Part Type: Injector Harness ), ( UPC: 090127712870 ), ( Manufacturer Part Number: 558-212 )

Review HOLLEY EFI Ford V8 Injector Harness

The Holley EFI 558-212 injector harness is a high-performance, factory-fit solution for Ford V8 engines, specifically designed for use with Holley's EFI systems. This harness is an essential component for delivering fuel to the engine's injectors in a precise and controlled manner, ensuring optimal engine performance.

This harness is engineered with a plug-and-play design, allowing for easy installation and integration with Holley EFI systems. It features a durable, automotive-grade, vinyl-jacketed wiring that resists abrasion and damaging UV rays, ensuring long-lasting reliability.

The 558-212 harness includes eight injector connections, each equipped with a high-quality, quick-disconnect, and O-ring sealed connector. These connectors provide a leak-free seal and simplify the process of connecting and disconnecting the injectors, making maintenance and servicing easier.

The harness also includes a wiring harness for the Ford V8 camshaft position sensor, making it a comprehensive solution for Ford V8 EFI applications. The connectors on the harness are color-coded and clearly labeled, making it easy to identify and connect the various wires to their corresponding terminals on the EFI system.

This harness is designed to work with Holley's 550, 554, 555, and 556 EFI systems, and is suitable for use with gasoline Ford V8 engines, including those found in the Mustang, F-150, and other Ford vehicles.

In summary, the Holley EFI 558-212 injector harness is a high-quality, factory-fit solution for Ford V8 engines, designed for use with Holley EFI systems. Its durable construction, quick-disconnect connectors, and comprehensive wiring make it an excellent choice for those seeking reliable, high-performance fuel delivery for their Ford V8 EFI applications.

The Holley EFI 558-212 injector harness is a popular choice for Ford V8 engines running Holley Electronic Fuel Injection systems. This harness provides a reliable and convenient way to connect the fuel injectors to the EFI system. In this response, I will discuss the pros and cons of buying this harness to help you make an informed decision.

1. Compatibility: This harness is specifically designed for Ford V8 engines and is compatible with various Holley EFI systems.

2. Easy installation: The harness comes pre-terminated with plug-and-play connectors, making the installation process straightforward and hassle-free.

3. High-quality materials: The harness is made from heavy-duty, flame-retardant materials, ensuring durability and reliability.

4. Improved engine performance: By providing precise fuel delivery to the engine, the harness contributes to improved engine performance and fuel efficiency.

5. OEM-style connectors: The harness uses OEM-style connectors, which can make troubleshooting and maintenance easier.

1. Cost: The Holley EFI 558-212 injector harness is more expensive compared to some aftermarket alternatives.

2. Limited compatibility: While the harness is designed for Ford V8 engines, it may not be suitable for all applications. Always ensure compatibility before purchasing.

3. Lack of customization: Since the harness is pre-terminated, there is no option for customizing the length or configuration of the wiring.

In conclusion, the Holley EFI 558-212 injector harness offers several advantages, including ease of installation, compatibility, and improved engine performance. However, its higher cost and limited customization options may be concerns for some buyers. Ultimately, if you are building or upgrading a Ford V8 engine using a Holley EFI system, this harness is a reliable and convenient choice.

If you're looking for a cost-effective alternative, you may consider exploring aftermarket harnesses from other manufacturers or custom-building your own harness. However, be aware that these options may require more time, effort, and expertise to ensure proper functionality and reliability.

part # 558212 prices

• $199.95-$210.41

specifications injectiopug:

• for makes: Ford
• brand: Holley Efi
• part type: Injector Harness
• upc: 090127712870
• manufacturer part number: 558-212

seller injectiopug:

• rating: 98.9%
• # reviews: 15452

offer injectiopug:

• sold: 0
• started: August 28, 2025
• quantity: 10
• availability: In Stock
• options: Ship-to-home

shipping injectiopug:

• service: UPS Ground
• transit: 5-8 Days
• type: Fixed
• carrier: UPS
• cost: $0.00
• class: Standard

payments injectiopug:

• credit card: Discover
• wallet: Google-pay
• other

general injectiopug:

• Air Fuel Delivery > Fuel Injection Parts > Additional Fuel Injection Parts
• condition: New

returns injectiopug:

• policy: Returns Accepted
• paid by: Seller
• time: 30 Days

Holley Efi 558-212 Is Similar To:

• Holley Efi 534-244 Ls Billet Fuel Rails Truck Intakes Open Box Missing Hardware (44.3% similar) $233.95–$236.27. (September 20th, 2024)
• Holley Efi 12-851 Vr Series Fuel Pressure Regulator 2-port Adjustable High (39.3% similar) $449.95–$460.95. (September 30th, 2024)
• Holley Efi 534-103 Fuel Injector And Insulator Retainer Kit - (57.7% similar) $35.95. (January 6th, 2025)
• Holley 557-200 Efi 3 Port Boost Control Solenoid Valve (39.2% similar) $186.95–$221.75. (January 13th, 2025)
• Holley 522-241 Fuel Injector Gas (66.7% similar) $127.70. (February 18th, 2025)
• Holley 558-452 - Can Adapter Harness 4ft Male To Female (51% similar) $28.50–$59.55. (February 22nd, 2025)
• Holley Efi 558-418 Gen Iii Hemi Drive-by-wire Harness - Late Pedal (51.4% similar) $255.95–$277.39. (March 11th, 2025)
• Holley Efi 300-685bk 105mm Throttle Body Adapter Billet Black Finish (34.2% similar) $104.95. (March 16th, 2025)
• Holley Efi 534-209 Ls Hi-flow Fuel Rails Ls1 Ls2 Ls3 Ls6 And L99 Factory Intakes (43.9% similar) $149.99–$256.31. (March 17th, 2025)
• Holley Efi 300-676bk 105mm Throttle Body Adapter Cast Black Finish (36.7% similar) $52.95. (March 29th, 2025)
• Holley Efi 558-484 M8 Extension - 4ft (52.5% similar) $40.22–$142.95. (April 2nd, 2025)