HOLLEY EFI 558-111 Engine Harness Ls Tbi 090127717738 24X

( Brand: Holley Efi ), ( Part Type: Engine Harness ), ( UPC: 090127717738 ), ( Manufacturer Part Number: 558-111 )

Review HOLLEY EFI Main Engine Harness 24x Ls Tbi

The Holley EFI 558-111 engine harness is a high-performance solution designed specifically for 24x LS TBI (Throttle Body Injection) engines. This harness is an essential component for any enthusiast looking to upgrade their engine management system with Holley's Electronic Fuel Injection technology.

This engine harness comes with a comprehensive list of features. It includes a fully-terminated wiring harness that ensures an easy and hassle-free installation process. Each connector is color-coded and labeled for precision and clarity, making wiring simpler and more efficient. The harness also includes a fuel pressure regulation harness, a water temperature sensor harness, and a crank sensor harness.

The 558-111 harness is designed to work seamlessly with Holley's EFI systems, such as the EFI Avenger and EFI Dominator. It offers flexible tuning capabilities, allowing you to calibrate your engine for optimal performance. This harness is also compatible with various Holley EFI controllers, including the Holley HP EFI, Holley Sniper EFI, and Holley Mid-Mount EFI.

The Holley EFI 558-111 engine harness is manufactured using top-quality materials. It features heavy-duty, 16-gauge wiring that can withstand the rigors of high-performance applications. The harness is also designed to meet or exceed OEM specifications for reliability and durability.

Installation of the harness is straightforward and can be completed in a few hours, depending on the complexity of your engine bay. The harness includes a detailed instruction manual that outlines each step of the installation process. Additionally, Holley offers technical support to help answer any questions you may have during the installation process.

The Holley EFI 558-111 engine harness is an excellent investment for any 24x LS TBI engine builder or enthusiast seeking to upgrade their fuel injection system. It offers superior performance, durability, and ease of use, making it a popular choice among the performance community.

The Holley EFI 558-111 engine harness is a popular option for individuals looking to convert their 24x LS TBI engines to electronic fuel injection. Here are some pros and cons that can help you make an informed decision about purchasing this engine harness:

1. Compatibility: The Holley EFI 558-111 harness is specifically designed for use with 24x LS TBI engines, ensuring a reliable and secure connection between the engine and the EFI system.

2. Flexibility: This harness supports both Holley EFI and Dominator EFI systems, giving you the freedom to choose your preferred fuel injection technology.

3. Easy installation: The harness comes with clear instructions and plug-and-play connectors, simplifying the installation process for most users.

4. Improved engine performance: With electronic fuel injection, you can expect improved idle stability, smoother engine operation, and more precise fuel delivery.

5. Wide compatibility: The Holley EFI system is compatible with various transmission types and cooling systems, making it a versatile solution for different applications.

1. Cost: The Holley EFI system, including the engine harness, can be relatively expensive compared to traditional TBI systems.

2. Complexity: Converting your engine to electronic fuel injection can be a complex process, and you may need professional help or extensive knowledge to install and configure the system correctly.

3. Compatibility with other components: Ensure that all other relevant components, such as the ignition system, are compatible with the Holley EFI system before making the purchase.

4. Potential for errors: With more components involved in the fuel injection process, there is a higher potential for errors or malfunctions that could require additional time and resources to troubleshoot.

In conclusion, the Holley EFI 558-111 engine harness offers numerous benefits, such as improved engine performance and compatibility with various systems. However, it comes with a higher cost, increased complexity, and potential compatibility issues with other components. If you are comfortable with the installation process and are committed to the performance benefits of electronic fuel injection, then the Holley EFI 558-111 engine harness is a worthwhile investment. However, if you are on a budget or prefer a simpler solution, a traditional TBI system may be more suitable for your needs. Ultimately, the decision depends on your specific requirements, expertise, and goals for your LS TBI engine.

part # 558111 prices

• $644.95-$750.38

specifications injectiopug:

• brand: Holley Efi
• part type: Engine Harness
• upc: 090127717738
• manufacturer part number: 558-111

returns injectiopug:

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

general injectiopug:

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

payments injectiopug:

• other
• wallet: Paypal
• credit card: Mastercard

seller injectiopug:

• # reviews: 17912
• rating: 99.3%

offer injectiopug:

• options: Ship-to-home
• availability: In Stock
• quantity: 3
• sold: 0
• started: December 3, 2025

shipping injectiopug:

• carrier: UPS
• class: Standard
• service: UPS Ground
• type: Fixed
• transit: 2-6 Days
• cost: $0.00

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