Holley EFI 558-117 Universal MPFI Coil-On-Plug Main Harness - Customizable Ignition

SKU: GVMR_558-117
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Flexible Coil-On-Plug Ignition for Any Custom BuildEmpower your unique engine ...Read More

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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

Flexible Coil-On-Plug Ignition for Any Custom Build

Empower your unique engine project with the Holley EFI 558-117 Universal MPFI Coil-On-Plug Main Harness. This versatile ignition wiring harness is designed for custom applications, providing the flexibility needed to integrate a modern coil-on-plug (COP) ignition system into virtually any Multi-Port Fuel Injection (MPFI) setup. Achieve superior spark delivery, reduce electrical noise, and enjoy the benefits of a highly efficient and customizable ignition solution for your high-performance engine.

Adaptable Design for Diverse Applications

The universal nature of the 558-117 harness makes it an ideal choice for engine swaps, custom builds, or unique performance projects where off-the-shelf solutions don't fit. It allows you to precisely route and connect your coil-on-plug ignition components, ensuring a clean, professional installation. By providing a direct, powerful spark to each cylinder, this harness contributes to improved engine response, better fuel economy, and increased overall power output. Its robust construction ensures reliability in any demanding environment.

  • Universal MPFI Compatibility: Ideal for custom builds and engine swaps requiring COP ignition.
  • Flexible Installation: Adaptable design for precise routing and clean setup.
  • Optimized Spark Delivery: Ensures powerful, consistent spark to each cylinder.
  • Enhanced Engine Performance: Contributes to improved throttle response and efficiency.
  • Durable Construction: Built to withstand extreme temperatures and vibrations.

Build Your Dream Engine with Holley EFI

When precision and adaptability are paramount, the Holley EFI 558-117 Universal MPFI Coil-On-Plug Main Harness delivers. It's the perfect foundation for a high-performance ignition system in a custom application, giving you the control and reliability you demand. Trust Holley EFI to provide the quality components that bring your vision to life and ensure your engine performs at its peak. Explore this and other essential wiring solutions for your project at GGCRACING.

Product Details

Product Description
Part Numbers
Sizing & Fit

Flexible Coil-On-Plug Ignition for Any Custom Build

Empower your unique engine project with the Holley EFI 558-117 Universal MPFI Coil-On-Plug Main Harness. This versatile ignition wiring harness is designed for custom applications, providing the flexibility needed to integrate a modern coil-on-plug (COP) ignition system into virtually any Multi-Port Fuel Injection (MPFI) setup. Achieve superior spark delivery, reduce electrical noise, and enjoy the benefits of a highly efficient and customizable ignition solution for your high-performance engine.

Adaptable Design for Diverse Applications

The universal nature of the 558-117 harness makes it an ideal choice for engine swaps, custom builds, or unique performance projects where off-the-shelf solutions don't fit. It allows you to precisely route and connect your coil-on-plug ignition components, ensuring a clean, professional installation. By providing a direct, powerful spark to each cylinder, this harness contributes to improved engine response, better fuel economy, and increased overall power output. Its robust construction ensures reliability in any demanding environment.

  • Universal MPFI Compatibility: Ideal for custom builds and engine swaps requiring COP ignition.
  • Flexible Installation: Adaptable design for precise routing and clean setup.
  • Optimized Spark Delivery: Ensures powerful, consistent spark to each cylinder.
  • Enhanced Engine Performance: Contributes to improved throttle response and efficiency.
  • Durable Construction: Built to withstand extreme temperatures and vibrations.

Build Your Dream Engine with Holley EFI

When precision and adaptability are paramount, the Holley EFI 558-117 Universal MPFI Coil-On-Plug Main Harness delivers. It's the perfect foundation for a high-performance ignition system in a custom application, giving you the control and reliability you demand. Trust Holley EFI to provide the quality components that bring your vision to life and ensure your engine performs at its peak. Explore this and other essential wiring solutions for your project at GGCRACING.

Product Details

Product Description

Flexible Coil-On-Plug Ignition for Any Custom Build

Empower your unique engine project with the Holley EFI 558-117 Universal MPFI Coil-On-Plug Main Harness. This versatile ignition wiring harness is designed for custom applications, providing the flexibility needed to integrate a modern coil-on-plug (COP) ignition system into virtually any Multi-Port Fuel Injection (MPFI) setup. Achieve superior spark delivery, reduce electrical noise, and enjoy the benefits of a highly efficient and customizable ignition solution for your high-performance engine.

Adaptable Design for Diverse Applications

The universal nature of the 558-117 harness makes it an ideal choice for engine swaps, custom builds, or unique performance projects where off-the-shelf solutions don't fit. It allows you to precisely route and connect your coil-on-plug ignition components, ensuring a clean, professional installation. By providing a direct, powerful spark to each cylinder, this harness contributes to improved engine response, better fuel economy, and increased overall power output. Its robust construction ensures reliability in any demanding environment.

  • Universal MPFI Compatibility: Ideal for custom builds and engine swaps requiring COP ignition.
  • Flexible Installation: Adaptable design for precise routing and clean setup.
  • Optimized Spark Delivery: Ensures powerful, consistent spark to each cylinder.
  • Enhanced Engine Performance: Contributes to improved throttle response and efficiency.
  • Durable Construction: Built to withstand extreme temperatures and vibrations.

Build Your Dream Engine with Holley EFI

When precision and adaptability are paramount, the Holley EFI 558-117 Universal MPFI Coil-On-Plug Main Harness delivers. It's the perfect foundation for a high-performance ignition system in a custom application, giving you the control and reliability you demand. Trust Holley EFI to provide the quality components that bring your vision to life and ensure your engine performs at its peak. Explore this and other essential wiring solutions for your project at GGCRACING.

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