HOLLEY EFI 558-101 Stealth Harness 090127666715 Tpi/stealth

( Brand: Holley Efi ), ( Part Type: Harness ), ( UPC: 090127666715 ), ( Manufacturer Part Number: 558-101 )

Review HOLLEY EFI Tpi/stealth Main Harness fits RAM

The Holley EFI 558-101 TPI/Stealth Ram Fuel Harness is a high-performance fuel delivery solution designed for Chevrolet small-block engines. This harness is an essential upgrade for any enthusiast looking to run a Holley Terminal Pressure Injection (TPI) or Stealth EFI system on their classic or modern Chevy muscle car.

The 558-101 harness is meticulously crafted with premium-quality materials, ensuring both durability and reliability. It features a Stealth design, which means all the connectors are hidden within the harness, providing a clean and neat appearance under the hood. The harness is also compatible with most popular Holley fuel pumps, including the 231, 251, and 255 series.

This harness includes a wide array of features to make installation and customization a breeze. It comes with a universal fuel pressure regulator, which can be adjusted from 2 to 10 psi, allowing users to fine-tune their fuel system for optimal performance. The harness also includes a built-in fuel pressure sensor, making it simple to monitor fuel pressure.

The 558-101 TPI/Stealth Ram Fuel Harness is also equipped with a multitude of fuel pressure and return line fittings, allowing for various mounting configurations. The harness is fully E85 compatible and can handle up to 100 psi of fuel pressure, making it an excellent choice for high-performance applications.

The connectors on the harness are color-coded for easy identification and come with O-ring seals to ensure a leak-free installation. The harness is also pre-terminated with premium-quality, 12-gauge wiring, ensuring a strong and stable power connection.

In summary, the Holley EFI 558-101 TPI/Stealth Ram Fuel Harness is a top-tier fuel delivery system designed for Chevrolet small-block engines. It offers a clean and discreet design, compatibility with various fuel pumps, adjustable fuel pressure, and a multitude of fuel line fittings to make installation and customization a straightforward process. This harness is an essential upgrade for any TPI or Stealth EFI system and is sure to impress even the most discerning enthusiasts.

The Holley EFI 558-101 TPI/Stealth Ram fuel harness is a popular choice for those looking to upgrade their fuel system in their performance vehicle. Here are some pros and cons to consider before making a purchase:

1. Fuel injection system: The Holley EFI system offers improved fuel delivery and precision compared to traditional carburetors. It provides better throttle response, fuel economy, and emissions control.

2. Plug-and-play design: The harness is designed to be a direct replacement for the stock fuel system, making installation relatively easy. The "stealth" design also helps to hide the harness and minimize the appearance of the fuel injection system.

3. Flexible configuration: The harness is compatible with a wide range of engines and can be configured for various fuel system setups, such as returnless or return-style systems.

4. High-quality components: The harness is made with high-quality wiring and connectors, which helps to ensure reliable operation and durability.

1. Cost: The Holley EFI system and harness can be more expensive than traditional carburetors and harnesses.

2. Complexity: While the harness is designed to be easy to install, it can still be a complex process for those who are not familiar with fuel injection systems.

3. Calibration: The fuel injection system requires calibration to work properly, which can be a time-consuming process.

4. Compatibility: While the harness is compatible with a wide range of engines, it may not be compatible with all engines or configurations.

In conclusion, the Holley EFI 558-101 TPI/Stealth Ram fuel harness offers several advantages, including improved fuel delivery, ease of installation, and flexibility. However, it also comes with some disadvantages, such as cost, complexity, and compatibility issues. Ultimately, the decision to purchase this harness depends on your specific needs and budget. If you are looking for improved performance and precision in your fuel system, and are willing to invest in the cost and complexity of a fuel injection system, then the Holley EFI harness may be a good choice for you. However, if you are on a tight budget or prefer a simpler fuel system, then a traditional carburetor and harness may be a better option.

part # 558101 price

• $649.95

specifications injectiopug:

• for models: Ram
• brand: Holley Efi
• part type: Harness
• upc: 090127666715
• manufacturer part number: 558-101

shipping injectiopug:

• service: UPS Ground
• class: Standard
• transit: 3-6 Days
• type: Fixed
• carrier: UPS
• cost: $0.00

offer injectiopug:

• options: Ship-to-home
• quantity: 7
• availability: In Stock
• sold: 0
• started: September 7, 2025

payments injectiopug:

• wallet: Apple-pay
• credit card: Visa
• other

returns injectiopug:

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

seller injectiopug:

• rating: 98.9%
• # reviews: 15633

general injectiopug:

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

Holley Efi 558-101 Is Similar To:

• Holley Efi 534-244 Ls Billet Fuel Rails Truck Intakes Open Box Missing Hardware (46% similar) $233.95–$236.27. (September 20th, 2024)
• Holley Efi 12-851 Vr Series Fuel Pressure Regulator 2-port Adjustable High (29.8% similar) $449.95–$460.95. (September 30th, 2024)
• Holley Efi 534-103 Fuel Injector And Insulator Retainer Kit - (46.3% similar) $35.95. (January 6th, 2025)
• Holley 557-200 Efi 3 Port Boost Control Solenoid Valve (35.6% similar) $186.95–$221.75. (January 13th, 2025)
• Holley 558-452 - Can Adapter Harness 4ft Male To Female (45.1% similar) $28.50–$59.55. (February 22nd, 2025)
• Holley Efi 558-418 Gen Iii Hemi Drive-by-wire Harness - Late Pedal (47.8% similar) $255.95–$277.39. (March 11th, 2025)
• Holley Efi 300-685bk 105mm Throttle Body Adapter Billet Black Finish (34.8% similar) $104.95. (March 16th, 2025)
• Holley Efi 534-209 Ls Hi-flow Fuel Rails Ls1 Ls2 Ls3 Ls6 And L99 Factory Intakes (39.4% similar) $149.99–$256.31. (March 17th, 2025)
• Holley Efi 300-676bk 105mm Throttle Body Adapter Cast Black Finish (35.4% similar) $52.95. (March 29th, 2025)
• Holley Efi 558-484 M8 Extension - 4ft (47.6% similar) $40.22–$142.95. (April 2nd, 2025)
• Holley Efi 534-285 Billet Fuel Rail Kit - Lsa And Ls9 (48% similar) $334.95–$336.35. (April 6th, 2025)