PRO M EFI8789 Foxbody Fuel Injection Kit

( Brand: Pro M ), ( Type: Wiring Harness ), ( Manufacturer Part Number: EFI8789 ), ( Universal Fitment: No ), ( Performance Part: Yes ), ( Fuel Type: Gasoline )

Review PRO M Foxbody 1988 89 Fuel Injection Kit fits MUSTANG 1988-89

Introducing the PRO EFI 8789 Fuel Injection Kit, specifically designed for 1988-89 Ford Mustang Foxbody models seeking to upgrade their fuel delivery system. This high-performance kit is engineered to provide superior fuel management, reliability, and drivability for your classic Mustang.

The heart of this kit is the state-of-the-art PRO EFI 8789 Engine Management System. This advanced electronic control unit (ECU) features a powerful microprocessor that optimizes fuel delivery based on real-time engine parameters, ensuring efficient combustion and increased power output. It is also programmable, allowing for custom tuning to cater to various driving styles and modifications.

This fuel injection kit includes a set of eight high-flow, 45-pound-per-hour (lb/h) fuel injectors. These injectors are designed to deliver precise amounts of fuel to the engine's intake manifold at optimal engine RPMs and load conditions. The result is a more responsive and powerful engine, as well as improved throttle response and drivability.

Additionally, the PRO EFI 8789 Fuel Injection Kit includes a high-pressure fuel pump, fuel filter, and all necessary fuel lines and fittings. The fuel pump is capable of delivering up to 35 psi of fuel pressure, ensuring that your injectors receive a consistent fuel supply. The fuel filter helps maintain fuel system cleanliness and prevent clogs, while the fuel lines and fittings are designed for durability and reliability.

To make installation as straightforward as possible, the PRO EFI 8789 Fuel Injection Kit comes with an easy-to-follow installation manual. It includes detailed instructions, wiring diagrams, and troubleshooting guides to help you confidently complete the installation process. The kit also includes all necessary hardware and mounting brackets for a hassle-free installation.

Upgrading to the PRO EFI 8789 Fuel Injection Kit is an investment in the performance and reliability of your 1988-89 Ford Mustang Foxbody. With its advanced electronic fuel management system, high-flow injectors, and durable components, this kit delivers impressive power gains, improved throttle response, and enhanced drivability. Whether you're cruising down the highway or pushing your Mustang to the limit on the race track, the PRO EFI 8789 Fuel Injection Kit is the ideal solution for your fuel delivery needs.

Pros and Cons of Buying a PRO EFI 8789 Fuel Injection Kit for 1988-89 Ford Mustang

a. Improved Fuel Economy: The PRO EFI 8789 kit offers a more efficient fuel delivery system, which results in better fuel economy compared to the stock carbureted setup.

b. Enhanced Performance: This fuel injection system is capable of delivering precise fuel mixtures to the engine, leading to improved engine performance and power output.

c. Better Idle Stability: With the PRO EFI 8789 kit, the idle stability is significantly improved, ensuring a smoother and more consistent idle.

d. Easy-to-Use: The kit comes with a user-friendly interface that makes tuning and adjusting the fuel injection system easier and more accessible for enthusiasts.

e. OBD-I Compliance: The PRO EFI 8789 kit is OBD-I compliant, allowing for easy emissions testing and diagnosis.

a. Cost: This fuel injection kit is a more expensive option compared to the stock carbureted setup, which may deter some buyers.

b. Complexity: Installing and tuning the PRO EFI 8789 kit can be a complex process, requiring some technical knowledge and skill.

c. Compatibility: The PRO EFI 8789 kit may not be compatible with all 1988-89 Ford Mustang models, so it's essential to verify compatibility before making a purchase.

d. Learning Curve: For those new to fuel injection systems, there may be a steep learning curve when it comes to tuning and adjusting the system for optimal performance.

The PRO EFI 8789 fuel injection kit offers several advantages, including improved fuel economy, enhanced performance, better idle stability, and OBD-I compliance. However, it also comes with potential drawbacks, such as a higher cost, complexity, and compatibility issues.

Upon considering the pros and cons, the decision to buy this fuel injection kit ultimately depends on your specific needs, goals, and technical abilities. If you're looking for better performance, improved fuel economy, and a smoother ride, the PRO EFI 8789 kit could be an excellent investment. However, if you're on a tight budget, lack the necessary technical skills, or prefer a simpler solution, you may want to consider other options.

1. Verify compatibility with your specific 1988-89 Ford Mustang model.

2. Thoroughly research the installation process and gather the necessary tools and knowledge.

3. Consider purchasing a tuning tool or seeking professional help for the initial setup and tuning.

4. Budget for the higher cost compared to the stock carbureted setup.

5. Embrace the learning experience and the potential performance gains that come with the PRO EFI 8789 kit.

part # efi8789 price

• $1349.95

specifications injectiopug:

• for models: Mustang
• for years: 1988-89
• brand: Pro M
• type: Wiring Harness
• manufacturer part number: EFI8789
• universal fitment: No
• performance part: Yes
• fuel type: Gasoline

seller injectiopug:

• # reviews: 28
• rating: 100.0%

general injectiopug:

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

offer injectiopug:

• availability: In Stock
• started: January 8, 2026
• options: Seller-arranged-local-pickup
• sold: 0
• best offers: True
• quantity: 1

returns injectiopug:

• policy: No Returns

shipping injectiopug:

payments injectiopug:

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

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